Prefixes, Roots, and Suffixes
The following pages list common prefixes, roots, and suffixes. When you are not sure about the meaning of a new word, try to figure it out by studying its parts. Each word part can unlock dozens of new words for you. The listed prefixes, roots, and suffixes are boldfaced, followed by their meanings in parentheses, and then by example words.
- Prefixes come before root words and act as modifiers.
- Roots provide the main meaning of a word and can be connected to other roots, prefixes, and suffixes.
- Suffixes come after the root word and act as modifiers.
Prefixes
a(n) (without, not, no) amoral, anaerobic, anarchy, apathy, asymmetrical
ab (from, away from, down from) absent, absorb, abstract, abdomen
ad (attached to, on, increase) adhere, adductor, adrenal
ag (together, gather) aggregate, agora
ambi (both, around) ambidextrous, ambiguous, ambivalent
amphi (both, in) amphibian, amphitheater
ana (again, backward) analogy, anaphase, anabolic
ante (in front of, before) antebellum, antecedent, antechamber, anterior
ant(i) (against) antacid, antibody, antidote, antioxidant
auto (self, same) autograph, automatic, automobile, autonomous
be (totally, overly) belittle, bemoan, bemuse, beware
ben (well, good) benefit, benediction, benefactor
bi (two) bipedal, binary, binocular
cata (down, against) cataclysmic, catastrophic, catatonic
circum (around) circadian, circumference, circumstance, circus
co (with, together) coed, cohere, cooperate
com (together) compare, compete, compose, compromise
con (with, together) congregate, conjoin, connect, connote
contra (opposed to) contradict, contrary, contrapuntal
counter (against, opposite) counterargument, counterfeit, counterpart
de (away, opposite) degenerate, decommission, deodorize, detoxify
di (two, apart) diatomic, dichotomy, digress, divergent
dia (through, across) diagnosis, diagonal, diaphragm, diameter
dis (undo, apart) disconnect, dismiss, disrespect, dissolve
dys (bad, ill) dysfunctional, dystrophy, dyslexia
e(c) (out of, exclude) eccentric, elicit, elect, emit
en (in, within) enfold, engage, entangle, enter, enwrap
end(o) (inside) endocrine, endoskeleton, endothermic
epi (over, on, attached) epidemic, epidermis, epiphenomenon, episode
eu (good) euphony, eulogy, euphemism, euthanasia
ex (from, former) exit, excrete, ex-president, extinct
exo (outside) exoskeleton, exothermic
exter (outside) external, exterior, extrinsic
extra (additional) extracurricular, extraterrestrial, extraneous
fore (preceding) forecast, forehead, foreshadow, foreshorten
hemi (half) hemisphere, hemicycle, hemiplegia
hepta (seven) heptagonal, heptathlon
hexa (six) hexadecimal, hexagon, hexameter
hyper (excessive, above) hyperactive, hyperextension, hyperventilate
hypo (less than, under) hypochondria, hypodermic, hypoglycemia, hypothermia
im (not) immaculate, immediate, immature, immobile, impractical
in (into, not, without) incarnate, inception, incompetent
infer(i) (below) infer, inference, inferior, infernal
infra (beneath) infrared, infrastructure, infrasonic
inter (among/between) interact, Internet, interstate, interval
intra (inside) intramural, intrapersonal, intravenous
intro (into, within) introduction, introspection, introvert
iso (equal) isobar, isometric, isosceles, isotope
kilo (thousand) kilocalorie, kilogram, kilometer, kilowatt
mal (bad) maladapted, malevolent, malformed, malicious
micro (minute, millionth) microorganism, micrometer, microscope, microwave
mid (middle) midday, midnight, midpoint, midsummer
milli (thousand, one-thousandth) millennium, milliliter, millimeter, millipede
mini (least, small) miniature, minimize, minivan, minimal
mis (bad) misbehave, misconception, miscue, misdemeanor
mono (single) monochromatic, monogamy, monogram, monolith
mult(i) (many) multicellular, multilateral, multiple, multitude
nano (one billionth) nanometer, nanosecond, nanotechnology
neo (new) neoclassical, neophyte, neologism
non (not) noncompliant, nonconformist, nonfiction, nonsense
ob (toward, against) oblong, obstruct, obtrusive
oct(o) (eight) octave, octagon, octopus, October
omni (all) omnipotence, omnipresence, omniscience, omnivorous
over (above, exceed) overestimate, overpay, overwhelm
pan (all) panacea, pandemic, pantheism
para (beside, beyond) parabola, paramedic, paranoia, parasite
penta (five) pentad, pentagon, pentameter, pentadactyl, pentatonic
per (through, completely) perfuse, permeate, perspective
peri (all around) pericardium, perimeter, periodontal, periphery
poly (many) polygamy, polygon, polynomial, polypeptide
post (after) posterior, posthumous, postmodern, postpartum
pre (before) prepare, predict, preposition, preview
pro (before) proboscis, procure, prognosis, prologue, prophase
pro (favoring, substituting for) pro-choice, pro-life, protagonist, pronoun
prot(o) (first) protoplasm, prototype, protozoa
pseudo (false) pseudonym, pseudopod, pseudoscience
quadri (four) quadruped, quadrilateral, quadruplet, quatrain
quart (four) quart, quarter, quartet, quartile
quint (five) quintet, quintuplet, quintessence, quintessential
re (back, again) redo, regain, resound, retract, revise
retro (backward) retroactive, retrorocket, retrospect
semi (partly) semicircle, semipermeable, semipro, semisolid, semitrailer
sept (seven) septet, septuagenarian, septuple
sesqui (one and a half) sesquicentennial, sesquipedal, sesquipedalian
sex (six) sexpartite, sextet, sextant, sextuplet
sub (under) subcutaneous, submarine, subspecies, substance
super (above) superimpose, superior, superluminal, supernatural, supersonic
supra (above) supramolecular, supraorbital, supreme, supremacy
sym (with, same) symbol, symphony, symmetry, sympathy
syn (together) synapse, synergy, synthetic, syndicate, synchronous
ter (three) tertiary, tercet, tertian
tera (trillion) terabyte, teraflop, terahertz
tetra (four) tetrad, tetrameter, tetrahedron, Tetragrammaton
trans (across) transact, transfer, transmit, transport, transpose
tri (three) triangle, triceratops, tricuspid, triceps, triptych, trinity
ultra (beyond) ultraliberal, ultramarine, ultrasonic, ultraviolet
un (not) uncharted, unexamined, unwashed, unworthy
under (below) underage, underrated, underrepresented, understated
uni (one) unicorn, unilateral, unicycle, unisex, unit, unite
up (above) update, uphold, upscale, upstage, upturn
with (together) withhold, within, without, withstand
Roots
acet (acid, vinegar) acetic acid, acetyline
ac, acu (bitter, sharp) acrid, acumen, acute
acr(o) (high, hill, top) acrobat, acropolis
aer(o) (air, gas) aerobic, aerial, aerodynamic
agon (struggle) agony, protagonist, antagonist,
agr(o) (fields, soil) agriculture, agronomy
alb(u) (white) albino, albumin, albatross
alim (digestion) alimentary, alimony
allo (other, different) alloy, allocate
alter (another) alter ego, alternative
alt(o) (high) altitude, altimeter, alto
am (love) amateur, amoretto, amour propre
amb(ul) (walk) amble, ambulate, ambulance
ampli
- (large, increase)
andr(o) (male) android, androgynous
angio (vessel) angiogram, angioplasty
anim (soul, breath, spirit) animal, animus, animate
anni, annu, enni (year, segmented) annual, anniversary, annuity, centennial
anth (flower) anther, acanthus, anthesis
anthrop (human) anthropology, anthropoid, philanthropy
antiq (old) antique, antiquated, antiquity
aper (open) aperture, apertif
apo (detached, off) apogee, apocalypse
append (hang on, addition) append, appendage, appendix
aqua (water) aquarium, aqueous, aquifer
arbor (tree) Arbor Day, arboreal, arboretum
arch(eo) (beginning, primitive, ancient) archaic, archeology, archive
arterio (vessels leading from heart) artery, arteriosclerosis
arthr(o) (joint, jointed) arthritis, arthropod
articul (joint) articulate, articulation
aster, astro (star) aster, asteroid, astronaut, astronomy
audi (hear) audio, audible, audition, auditorium, audience
avi(s) (bird) avian, aviary, aviator
axi (axis, turn) axis, axle
bar (pressure, weight) barometer, baritone
bas (base) base, basal, basis, bass
bib(lio) (book) bibliography, bibliophile
bio (life) biography, biology, biosphere, biopsy
boli (ball, throw) bolus, metabolism, parabola, parable,
bot (plant) botany, botanical, botanist
brachi (arm) brachia, embrace
brevi (short) abbreviate, brief, brevity
bronch (trachea) bronchia, bronchitis
bulla (important) bullet, bulletin
bursa (purse, bodily pouch) bursitis, disburse, reimburse
calc(i) (lime, chalk, pebble to render) calcium, calcify, calculate
calo(r) (heat) calorie, caloric, calorimeter
cand (bright) candle, candent, incandescent
capilli (hair) capillary, capillarity
capit (head) capital, decapitate, captain
carcin (cancer) carcinogen, carcinoma
cardi(o) (heart) cardiogram, cardiology
carn(i) (flesh) carnage, carnal, carnival, carnivore
carp (wrist) carpus, carpal-tunnel syndrome
caryo (nucleus) eukaryote, prokaryote
cath (clean, pure) catheter, catharsis
caus (burn) caustic, cauterize, holocaust
cav (hollow) cave, cavity, concave
caval (horse) cavalry, cavalier, chivalry,
cede, ceed (go, yield), concede, precede, recede, secession, succeed
cereb (brain) cerebellum, cerebral, cerebrum
cervi (neck) cervical, cervix
chemo (chemical) chemical, chemotherapy
chlor(o) (green, chlorine) chlorine, chlorophyll, chloroplast
chol (bile) cholera, cholesterol
chondr (cartilage, small) hypochondriac, mitochondria
cell (room) cell, cellular
cens (judge) census, censor, consensus
cent (hundred, one hundredth) centigrade, century, centimeter, percent
centr (center) centrifugal, centrifuge, centripetal, eccentric, ethnocentric
cephal(o) (head) cephalic, cephalopod, hydrocephalus
ceps (head) biceps, forceps, triceps
cept (take) concept, interception, perception, reception
chrom(o) (color) chromatic, chromosome, chromoplast
chron(o) (time) anachronism, chronology, chronograph
cine (movement) cinema, cinematic, cinematography
cis(e) (cut) excise, incise, incisor, scissors
claim (cry out) exclaim, declaim, proclaim
class (group) class, class-action, classification
clast (broken) clastic, iconoclastic, pyroclastic
claust (tight space) claustrophobia, closet
clima (region) climate, climatic climax
cline (lean) incline, recline
clude (close) conclude, exclude, include, seclude
cogni (know) cognition, cognitive, recognize, cognizant, incognito,
colo (colon) colon, colonoscopy, colitis
copia (abundance) copious, cornucopia
corn (horn) cornea, cornucopia, unicorn
corpus (body) corporation, corpse, corpuscle
cosm (universe) cosmos, cosmopolitan, microcosm
cracy (rule) autocracy, aristocracy, democracy, meritocracy
cran (skull, brain) cranium, craniology, craniosacral
crat (supporter of, rule) aristocrat, bureaucrat, democrat
cred (to believe) credible, credit, credence, incredulous
cruc(i) (cross) cruciform, excruciate, crucify, crusades
crusta (shell) crustacean, crusty
cry(o) (extreme cold) cryogenic, cryonics, cryophilic
crypt (hidden) crypt, cryptic, encrypt
cubo (lie in) incubate, incubator, incubus
culp (fault) culpable, culprit
cumu (mound) accumulate, cumulus, cumulative
curs (run) cursor, cursory, cursive, precursor
cusp (point) cusp, cuspid, bicuspid
cuti (skin) cuticle, subcutaneous
cyan(o) (blue-green) cyan, cyanide, cyanobacteria
cycl (wheel) cycle, cyclonic, encyclical, unicycle
cyt(o/e) (hollow vessel) cytology, cytoplasm, leukocyte, lymphocyte
dactyl (finger, toe) dactyl, polydactyl, pterodactyl
deca (ten) decade, December, dodecahedron
deci (one tenth) decibel, decimate, decimeter
dem (people) demagoguery, democratic, demographic, epidemic
dent, dont (tooth) dentist, dentin, orthodontist
derm (skin) dermis, epidermis, hypodermic, echinoderm
dextr (right) ambidextrous, dexterity, dextrose
dict (speak) diction, dictate, indict, predict, verdict
divi (cut, apart) divide, dividend, individual
dorm (sleep) dormant, dormitory
dox (belief) doxology, orthodoxy
drome (race course, running) hippodrome, syndrome, velodrome
duct (carry) abduct, aqueduct, conduct, product
dura (hard) durable, duration, endure, epidural
dyn(a) (force, power) dynamic, dynamo, dynasty
eco(s) (house) ecology, economy, ecosystem
ech (sound) echo, echocardiogram, echolocation
eff(u) (pour out) effluence, effulgent, effuse, effusive
ego (self) ego, egotistical, superego
elast (regain shape) elastic, elasticity
electr(o) (electricity) electric, electrocute, photoelectric
embryo (swelling within) embryo, embryonic, embryogenesis
entero (intestine) enteritis, gastroenterologist
epheme (passing away) ephemera, ephemeral
equ (equal) equate, equator, equilateral
erg(y) (work) energy, ergonomic, synergy
eso (within) esophagus, esoteric
esthesia (feeling) anesthetic, esthetic, kinesthetic
eth(i) (character) ethics, ethical
ethno (race) ethnic, ethnicity
faci, fact (make) facile, facilitate, facility, manufacture
feli (happiness) felicity, felicitous
fera (wild) feral, ferocity
fido (faithful) fidelity, fiduciary, hi-fi, infidelity
fin (final) finial, finish, finitude, infinite
fissi (split) fissile, fission, fissure
flect (turn) deflect, inflect, reflect
flex (bend) circumflex, flexible, flexor
flict (strike) afflict, conflict, inflict
flor (flower) flora, Florida, florist
flu(x) (flow) effluent, fluent, fluency, fluctuate, influence
fluor (glow) fluoresce, fluorescent, fluoroscope
foli(o) (leaf) defoliate, exfoliate, folio, foliage, foliate
form (shape) cruciform, formidable, formula
fort, forc (strong) enforce, forcible, fortify
fossa (dig) fossil, fossilize
fract (broken) fraction, fracture, infraction, refract
fragi (delicate) fragile, fragility, fragment
frat (brother) fraternal, fraternize, fratricide
fric (rub, carve) friction, fricative
frigi (cold) frigid, frigidity, frigorific, refrigerate
fruc (fruit) fructify, fructose, frugivorous
fug(e) (drive out, flee) centrifuge, fugitive, fugue, refugee
fuma (smoke) fumigate, fuming
fund (bottom) fund, funding, fundament, fundamental
fung (mushroom) fungus, fungicide
furi (rave, insane) furious, furor, fury, infuriate
fuse (melt, combine) confuse, fuse, fusion, infuse, transfuse
gala (milk-white) galaxy, galactose
gamet (reproductive) gamete, gametophore, gametophyte
gamy (marriage) bigamy, monogamy, polygamy
gangli (knot, tumor) ganglia, ganglion
gastr(o) (digestive) gastric, gastritis, gastrointestinal
gen (origin) gene, generation, genetics, oogenesis
gen(y) (kind, tribe) genealogy, genotype, homogeny, progeny
genus (class, become) gene, general, genus, genuine
ge(o) (earth) geocentric, geography, geology, geometry
geri (old) geriatrics, gerontology
germ (sprout, seed) germ, germicide, germinate
gesto (carry) egest, digest, gestate, ingest
giga (giant, billion) gigabyte, gigantic, gigahertz, gigawatt
gloss (tongue) gloss, glossary
glot (tongue) glottal, glottis, polyglot
gluc, glyc(o) (sugar) glucose, glycerin, hypoglycemia
gnos(is) (knowledge) agnostic, diagnostic, Gnostic, prognosis
gon (angle) octagon, pentagon, polygon
grad (step) centigrade, gradient, gradual, graduated
gram (written record) cardiogram, diagram, grammar, program, telegram
graph (write, recording) autobiography, autograph, cartography, cinematography, geography, graphic, photograph, polygraph, topographical
gregate (gather) aggregate, congregate, gregarious
gress (walk, enter) digress, egress, ingress, progress, transgress
gyn(ec) (female) androgyny, gynecology, gynecologist
gyro (whirl) autogyro, gyration, gyroscope
hab, habit (live) cohabitate, habitat, inhabit
hal (salt) halide, halite, halophile, halophyte
hallu (wander mentally) hallucinate, hallucinogenic
hect (hundred) hectare, hectogram, hectoliter, hectometer
hedron (shape) dodecahedron, heptahedron, polyhedron, tetrahedron
heli (spiral) helix, helicopter
helio (sun) heliocentric, heliograph, heliopause, heliostat
hem(o), hemat (blood) hematoma, hemoglobin, hemophilia, hemostat
hepat (liver) hepatic, hepatitis
herb(a) (plant) herbaceous, herbal, herbalist, herbivore
hereo (cling) adhere, adhesion, coherence, cohesive
herp (reptile) herpetology, herpetological
heter(o) (other) heterogenous, heterosexual
hibern (winter) hibernal, hibernate
hist(o) (tissue) histamine, histology, histogram
holo (whole) Holocene, holocaust, holograph
homeo (same) homeostasis, homeopathic
homi (human) homicide, hominid, hominoid
homo (same) homogenous, homosexual
hum (earth) exhume, humus, inhume, posthumous
hydr(o) (water) hydrate, hydrant, hydroelectric, hydrophobia, hydrothermal
hypn (sleep) hypnotic, hypnotism, hypnotherapy
icon (image) icon, iconic, iconoclastic, iconography
idi(o) (individual, self) idiom, idiosyncratic
ignis (fire) igneous, ignite, ignition
immune (safe, exempt) immunity, immunology, immunotherapy
incis (cut into) incision, incisor, incisive
ject (throw) eject, inject, project, reject, trajectory
jud(ic) (judge) judge, judicial, judiciary, injudicious
junct (join) adjunct, conjunction, junction, disjunct
juven (youthful) juvenile, rejuvenate
karyo (nucleus) eukaryote, prokaryote
kines(a) (movement) cytokinesis, kinesthetic, kinesiology, telekinesis
lacer (slash, mangled) lacerate, laceration
lact (milk) lactation, lactic, lactose
lamin (layer) laminar, laminate
langui (faint) languid, languish, languor
lapid (stone) dilapidate, lapidary
larva (specter, mask) larvae, larval, larvicide
laryng (throat) laryngitis, laryngoscope, larynx
laten (hidden) latency, latent
later(o) (side) lateral, bilateral, multilateral, unilateral
lati (broad) latitude, latitudinarian
lax (loose) laxative, laxity, relax
lega, legit (bequeath, law) legacy, legal, legitimate, illegitimate
leuk(o) (white, clear) leukocyte, leukemia
levat(a) (raise) levitate, levy, elevate
leve (balance) level, lever
lex (speech, word, law) dyslexia, lexicology, lexicon
liber (free) liberal, liberation, libertine
libra (balance) deliberate, equilibrium
liga (to bind) ligament, ligate, ligature
limbus (edge) limb, limbic, limbo
limin (threshold) eliminate, liminal, limit
linea (line) lineage, lineal, lineament
lingu (tongue) bilingual, lingo, lingual, linguistics,
linum (flax) linen, linnet, linoleum
lip (fat) lipase, lipid, lipoprotein, liposuction
liqua (fluid) liquid, liquidate, liquor
lith (stone) gastrolith, lithograph, monolith, Neolithic
lobe (rounded) lobe, lobotomy, lobular
loca (place) locale, locate, locus, locomotive
logo (word) apology, logic, eulogy, monologue
logy (study of) astrology, biology, ecology, zoology
lubri (slippery) lubricant, lubricate
luci (light) lucid, lucent, lucifer, luciferous
lud (play) allude, elude, ludicrous
lumb (lower back) lumbar, lumbago
lumen (light) bioluminescent, illumine, luminary, luminous
luna (moon) lunacy, lunar, lunation
lymph (clear liquid) lymph, lymphatic, lymphoma
lysis (break up, dissolve) analyze, dialysis, hydrolyze, lysosome
macro (large) macroscopic, macrophage, macronucleus
magn(i) (great) magnify, magnanimous, magnificent, magnitude
mal(i) (bad) malicious, malevolent, malformed, malignant
mall (hammer) malleable, mallet, malleus
mamm (breast) mammal, mammary, mammogram
mani, manu (hand) manipulate, manicure, manual, manufacture
mania (insane desire) manic, monomaniacal, kleptomaniac
mar (sea) marina, marine, mariner, maritime
masto (breast) mastectomy, mastitic, mastitis
materi (matter) material, materialism, immaterial
matic (relating to) automatic, mathematical, plasmatic, somatic
maxi (most) maximum, maximal, maximize
mea (pass through) permeate, permeability
mechani (machine) machine, mechanic, mechanize
medi (middle) median, mediate, medieval, mediocre
medic (heal) medicine, medical, medicate
mega (million, great) megabyte, megahertz, megaphone
megal(o) (swollen) megalomania, megalopolis
melan (black) melancholy, melanin, melanoma
memor (mindful) memory, memorial, memoir
ment (mind) dementia, mental, mentality, mention
mes(o)(i) (middle) Mesoamerica, Mesopotamia, mesosphere, Mesozoic
meta (later, change) metabolism, metamorphic, metaphase, metaphysics
meteor (weather) hydrometeorology, meteorology, meteorologist
meter, metr (measurement) centimeter, diameter, metronome, optometry
metr(o) (mother) metropolis, metropolitan
migra (wander) immigrant, migrant, migratory
mime (mimic) mimetic, mimicry, pantomime
minis (assist) administer, administrator, ministry
minu (less) minus, minute, minuet
mira (wondrous) miracle, miraculous, mirage
miso (hate) misogamy, misogyny, misanthropy
miss (to send) mission, missionary, missive
mit (send) admit, permit, submit, transmit
mito (thread) mitochondria, mitogen, mitosis
mobil (movable) automobile, immobile, mobilize
modus (way, mode) mode, moderate, module, modulate
mole (mass) mole, molecule, molecular
mollis (soft) mollify, mollusk
mor(t) (death) morgue, mortality, mortify, mortuary
morph (shape) endomorph, ectomorph, metamorphic, morphological
moto (moving) motif, motile, motive, motorcycle
mural (wall) intramural, mural
mut(a) (change) mutagen, mutate, mutation, mutable
mycin (from fungus) erythromycin, neomycin, streptomycin
narc (sleep, torpor) narcoleptic, narcosis, narcotic,
nat (birth) nationality, nativity, neonatal
naut (ship, sailor) astronaut, nautical, nausea
nebul (fog, mist) nebula, nebulous, nebulizer
necr(o) (death, corpse) necrotic, necromancy, necropolis
nema (thread, round) nematode, nematocyst
neur(o) (nerve) neurology, neuron, neurotransmitter
neutr(o) (neutral) neuter, neutron, neutrino
nictare (wink) nictitate, nictitating membrane
noct (night) nocturnal, nocturne, noctambulism
nod(o) (knot) nodular, nodule
nomen, nomin (name) nominal, nominate, nominee, nomenclature
nomy (science of, name) astronomy, economy, nominal
norm (rule) abnormal, normal, normative,
nota (know) notary, notation, notarize, notary, note
nova (new) Nova Scotia, novel, innovate, supernova
nox (harm) noxious, noxiousness, obnoxious
nucle (kernel) nuclear, nucleolus, nucleus
null (none) null, nullify
numer (number) enumerate, numeral, numerical, innumerable
nutri (food) nourish, nourishment, nutrient, nutrition
obver (turn) obverse, obversely
oculo (eye) binocular, monocle, ocular, oculist
odo (way, path) anode, cathode, odometer
odon (tooth) iguanodon, orthodontic, mastodon
offic (duty) office, officer, official, officious
oid (resembling) anthropoid, humanoid, mongoloid, ovoid
ol (alcohol) butanol, ethanol, methanol, propanol
olfact (smell) olfaction, olfactory
oligo (few) oligarch, oligarchy, Oligocene
oma (swelling, tumor) carcinoma, glaucoma, hematoma
ome (biological entity) biome, chromosome, cytosome, genome
onco (cancer) oncological, oncologist, oncology
onoma (name) onomatomania, onomatopoeia
onomy (knowledge) anatomy, astronomy, economy, taxonomy
onto (existence) ontological, ontology
onym (name) anonymous, acronym, pseudonym
oo (egg) oocyte, oologist, oospore
opera (work) opera, opus, operate, operant
ophthal (eye) ophthalmologist, ophthalmology, ophthalmia, ophthalmoscope
opia (vision) myopia, presbyopia
opin (think) opine, opinion
opsis (appearance) caryopsis, synopsis
opsy (examination) autopsy, biopsy
opt (choice) opt, option, optimism, optimum
opt(i/o) (eye, vision) optical, optician, optometrist
ora (mouth) oral, oracle, oration
orb (circle) orb, orbit, orbital
ordino (arrange) ordain, order, ordinal
ornith (bird) ornithology, ornithopod, ornithopter
orno (adorn) adorn, ornament, ornate
ortho (straight) orthodontic, orthodox, orthopedic, orthoscopic
oscill (swing) oscillate, oscillograph, oscilloscope
os, ossi, oste(o) (bone) osteoporosis, osteopath, ossify, ossification
osten (exhibit) ostensible, ostentation, ostentatious
ov(i) (egg) oval, ovary, ovoid, ovule
ox(y) (oxygen) oxygen, oxygenate, oxidization, deoxyribonucleic acid
pac, pax (peace) pacify, Pacific, pacifist
pachy (thick) pachyderm, pachytene
paleo (ancient) Paleocene, Paleolithic, paleontology
palpa (touch, feel) palpable, palpate, palpitation
pate (shallow, pan) pate, patella, paten, patent
pater, patr (father) paternal, paternity, paternoster
path(o) (feeling, suffering, disease) pathetic, pathological, pathogen, psychopath
pect (chest) expectorate, pectoral
ped (child) pediatrician, pediatric, pedagogy, pedigree
ped(i) (foot) bipedal, pedal, pedestrian, pedicle
pel (drive) expel, impel, propel, repel
pena (punishment) penal, penalize, penalty, penance, penitentiary
pend (to hand) append, dependent, impend
penetr (insert) penetrate, impenetrable
pept (one) peptide, peptize, polypeptide
period (time) periodic, periodical, periodically
pessimi (worst) pessimism, pessimist, pessimistic
phag (eat) esophagus, macrophage, phagocyte, sarcophagus
phal (fingers/toes) phalanges, phalanx
phan (show, appear) cellophane, diaphanous, phantom
pharmac (drug) pharmacy, pharmaceutical, pharmacological
pharyng (throat) pharyngeal, pharynx
phas (speech) aphasia, aphasic, dysphasia
phase (stage) anaphase, metaphase, prophase
pheno (visible, show) phenomenon, phenomenal, phenotype
philia (attraction) hemophilia, sophophilia
phil(o) (love) Philadelphia, philanthropy, philosophy
phleb (vein) phlebitis, phlebotomy
phob (fear) arachnophobia, claustrophobia, hydrophobia, phobia
phon(e) (sound) microphone, phonetic, symphony, telephone
phos (light) phosphor, phosphorescent, phosphorus
photo (light) photograph, photon, photosynthesis
phren (brain) phrenetic, phrenic, phrenology
phyl (tribe, class) phylogeny, phylum
phyll (leaf) chlorophyll, phyllode, phyllotaxy
physic (nature) physical, physician, physics
physis (change, growth) epiphysis, physical, physique
phyt(e) (plant) epiphyte, phytogenesis, phytoplankton
pinn (feather) pinna, pinion, pinnate
placeo (pacify) placate, placebo, placidity
plagia (kidnapping) plagiarism, plagiarist, plagiarize
plasm(a) (fluid substance) cytoplasm, ectoplasm, endoplasm, protoplasm
plast(y) (particle) chloroplast, euplastic, leucoplast
plat(y) (flat) plate, plateau, platform, platypus
plaud (praise) applaud, laud, plaudit
plect (braid, weave) complected, complex, complexion
plegia (paralysis) hemiplegia, paraplegia, quadriplegia
plete (fill) complete, deplete, replete
pleth (excessive) plethora, plethoric
pleur (rib) pleura, pleuropneumonia, pleurisy
plex (interwoven, strike) complex, perplex, solar plexus
plica (fold) pliant, compliant, complicate, replicate
plum (feather) plumage, plumate, plume
pne(a/um) (lungs, breathe) apnea, pneumonia, pneumatic
pod(a) (foot) arthropod, gastropod, pseudopod, podium, tripod
polar (opposed) dipolar, polarity, polarization, polarize, pole
polis (city) acropolis, metropolis, megalopolis, necropolis
pom (knob, fruit) pome, pomegranate, pommel
popu (people) populace, popular, populate, population
por (hole) osteoporosis, pore, porous, porosity
port (carry) export, import, portable, portfolio, transport
porta (gate) port, portal, portcullis
posi (place) deposit, imposition, position, positive
pota (river, drink) hippopotamus, potable, Mesopotamia
potent (power) impotent, omnipotent, potentate, potential
prehend (seize) apprehend, comprehend, prehensile
prim (first) primal, primary, primate, prime, primitive
proach (near) approach, rapprochement, reproach
propag (multiply) propaganda, propagate
propel (drive) propellant, propeller, propulsion
prox (near) approximate, proximal, proximity, proxy
psych (mind) psychic, psychology, psychopath, psychosomatic
pter (wing, fly) helicopter, ornithopter, pterodactyl
publi (populace) public, publicize, publish
pulmo (lung) pulmonary, pulmonology
pupa (doll) pupae, pupate, pupation
purg (purify) purge, purgative, purgatory
putr (decay) putrefaction, putrefy, putrescent, putrid
pyr(o) (fire) pyre, pyroclastic, pyromania, pyrometallurgy
qual (characteristic) qualify, qualitative, quality
quant (amount) quantify, quantity, quantum
quasi (partly, so called) quasi-intellectual, Quasimodo, quasar
quer, ques (seek) conquest, inquest, query, quest, question, request
quota (amount) quota, quotient, quotidian
radic (root) eradicate, radish
radio (spoke) radial, radiate, radioactive, radiometer
ranc (stink) rancid, rancor, rancorous
rapi (plunder) rapacious, rape, ravish
ras (scrape) abrasion, rasp, razor
rati(o) (fixed, reason) ratio, ration, rational, ratiocination
recidi (backslide) recidivism, recidivist
rect (right, straight) erect, direct, rectangle, rectify
reg (rule) regal, regent, regulate
relat (carried back) relate, relative, relativity, relation
relic (leave, neglect) relic, derelict, dereliction
render (return) rendering, rendition, surrender
repta (creep) reptile, reptilian
resid (remain) reside, residual, residue, residence
resona (echo) resonance, resonator, resound
reti (web) reticulate, retina, retinaculum
reve (show) reveal, revel, revelation
revi (see again) review, revise, revision
rhin(o) (nose) rhinoceros, rhinoplasty, rhinoscopy
rhiz(o) (root) rhizoid, rhizome, rhizosphere
rhod(o) (red, rose) rhodium, rhododendron, rhodolite
rig (stiff) rigid, rigor, rigorous
rogare (ask) rogation, interrogate, interrogative
rota (wheel) rotary, rotor, rotate, rotisserie
rrhea (flow) diarrhea, gonorrhea, menorrhea
rub (red) rubella, rubious, rubric, ruby
rupt (break) abrupt, disrupt, interruption, rupture
sacchar (sugar) polysaccharide, monosaccharide, saccharine
sacr (holy) sacred, sacrament, sacrifice, sacrum
sagac (wisdom) sage, sagacious, sagacity
sal (salt) saline, salary
saliv (spit) saliva, salivary, salivate, salivation
salu (health) salute, salubrious, salutary
salv (safe) salve, salvo, salvation, salvage
sanct (holy) sanctify, sanction, sanctity, sacrosanct, sanctuary
sangui (blood) sanguine, sanguinary, sanguineous
sanit (health) sanity, sanitary, sanitize, sanitation, sanitarium
sapien (wise) sapience, sapient, savant
sarc (flesh) sarcoma, sarcomere, sarcophagus, sarcosome
saur (reptile) dinosaur, Ichthyosaur, Tyrannosaurus
scala (ladder) scale, scalar, escalade, escalator
scene (stage) scenic, scenario, scenery
schizo (split) schist, schizoid, schizophrenia
scien (know) conscience, omniscience, science, scientist
sciss (cut) scission, scissor
sclera(o) (hard) arteriosclerosis, sclera, sclerotic, sclerosis,
scope, scopy (see) colonoscopy, microscope, oscilloscope, periscope, telescope
scrib, scrip (write) describe, inscribe, manuscript, prescribe, scribble
scrutia (study) inscrutable, scrutinize, scrutiny
sculp (carve) scalpel, sculpt, sculptor, sculpture
sect (divide) bisect, dissect, intersect, sect, section, transect
seism (shake) seismic, seismograph, seismology
sema (sign) semantics, semaphore, semiotic
semble (similar) assemble, dissemble, ensemble, resemble
seni (old) senile, senior, senescence
sens (experience) insensate, sense, sensation, sensible, sensual
seps (infection) asepsis, sepsis, septicemia
sequi (follow) consequence, sequel, sequence, sequential
sero (body) serology, serum
serpen (crawling) serpent, serpentarium, serpentine
serrat (jagged) serrate, serrations, Sierras
sert (join) assertive, desert, insertion
sessi (sit, attached) séance, sessile, session
sibilat (hiss) sibilant, sibilate, sibilance
sicc (dry) desiccant, desiccate, exsiccate
signum (sign) sign, signal, signet, signature, signify
similis (alike) facsimile, similar, simile, simulate, similar
sinu (wind, bend) insinuate, sinuate, sinuous
sipho (tube) siphon, siphonal, siphonophore
sist (stop, stand) assist, desist, insist, persist, resist
skeleton (dried body) cytoskeleton, exoskeleton, endoskeleton, skeletal
sol (sun) solar, solarium, solarimeter
solu, solv (loosen) absolve, dissolve, insoluble, solution, solve, solvent, resolve
soma(t), some (body) chromosome, lysosome, psychosomatic, somatic
som(e) (body) chromosome, lysosome, psychosomatic, somatic
somn(i) (sleep) insomnia, somnambulism, somniferous, somnolent
son(a) (sound) consonant, sonata, sonic, sonogram, sonorous
soph (wise) philosophy, sophist, sophisticated
sopor (lethargy) soporific, soporiferous
spasm (draw, rend) spastic, spasmodic, spasticity
spati (empty) space, spatial, spatiotemporal
speci (type) special, speciation, species, specific, specimen
spect (see) circumspect, inspect, prospect, respect, spectacle, spectator
spectro (spectrum) spectra, spectroscope, spectrometer
specul (spy) speculate, speculation, speculum
spend (hang) spend, expend, suspend
sphere (ball) atmosphere, ecosphere, hemisphere, spherical
spir(o) (breathe) aspire, expire, inspire, respire
spons (promise) response, responsible, sponsor, spouse
spont (free) spontaneous, spontaneity, spontaneously
squal (foul) squalid, squalor
stab (firm, standing) establish, stable, stabilize
stagn (sill pool) stanch, stagnate, stagnation
stalak (drip) stalactite, stalagmite
stasis, stat (stationary, control) homeostasis, static, statue, thermostat
stella (star) constellation, interstellar, stellar
stereo (two) stereomicroscope, stereophonic, stereoscopic
stigma (stain) astigmatism, stigmatic, stigmatize
still (drip) distill, instill, still
stoma(t) (mouth) stoma, stomata, stomach
strati (layer) stratus, stratum, stratify, stratosphere
stria (groove) striated, striation
strict (bind) constrict, restrict, strict, stricture
struct (build up) construct, destruct, obstruct, restructure, structure
stud (diligent) student, studio, studious, study
styl (stem) stylist, stylus, turnstile
suas (to advise, agree) assuasive, dissuade, persuade, suave
sublim (lofty) sublimate, sublime, subliminal
succu (juice) succubus, succulent, succulence
supin (lying back) supine, supinate, supination
suppos (put under) presuppose, suppose, supposition, suppository
surg (rise) insurgency, insurrection, surge
suspen (hang) suspend, suspense, suspension, suspender
syllab (take together) syllable, syllabic, syllabus
sylv (forest) sylph, sylvan, Pennsylvania
synthes (put together) photosynthesis, synthesis, synthesize, synthetic
symbio (live together) symbiotic, symbiosis, symbiote
sympto (fall together) asymptomatic, symptom, symptomatic
system
- (stand together)
systol (contract) asystole, diastole, diastolic, systole, systolic
tabul (board) table, tabulate, tabloid, tableau
tachy (rapid) tachycardia, tachyon
tacit (silent) tacit, tacitly, taciturn
tact (touch) tactful, tactile, tactical
tag (touch) contagious, tag
tail (cut) curtail, detail, retail, tailor
tain (hold) ascertain, certain, detain, obtain, retain,
tang (touch) intangible, tangible, tangent
tard (slow) tardy, tarry
tars (ankle) metatarsal, tarsier, tarsus
taxi (movement) phototaxis, taxicab, taximeter, taxiway
taxo (arrangement) taxidermy, taximeter, taxonomy
techn (skill) technical, technician, technique, technology
tele (distant) telepathy, telephone, telescope, television
telo (end) teleology, telomere, telophase,
temp (time, state) temper, temporary, temperature
tempt (touch) attempt, contempt, temptation
ten (grasp) tenacity, tenant, tenet
tend, tens (stretch, sinew) extend, portend, pretend, tendon, tendril, tensile
tenebr (dark) Tenebrae, tenebrific, tenebrous
tens (tight) intense, tense, tensile
term (boundary) interminable, term, terminal, terminate
terra (earth) terrain, terrestrial, territory
terri (frighten) terrible, terrify, terror, terrorism
test (witness) attest, contest, detest, protest, testament
text (weave) context, text, textile, textual, texture
thalam (inner chamber) hypothalamus, thalamus, thalamic
thana (death) euthanasia, thanatology, Thanatos
the(o/a) (God) atheism, polytheism, theism, theology
therap (treatment, examine) therapy, therapist, therapeutic
therm (heat) geothermal, endothermic, exothermic, hydrothermal, hypothermic
thora(c/x) (chest) thoracic, thorax, cephalothorax
thromb (clot) thrombophlebitis, thromboplastic, thrombosis
tinct (color) tinct, tint, tincture
tinni (ringing) tingle, tintinnabulation, tinnitus
titan (giant) titan, titanic, Titanism, titanium
tom(e) (part) atom, epitome, diatom
tom(y) (cut, slice) appendectomy, tonsillectomy, tracheotomy
ton(ic/o) (stretched) hypertonic, isotonic, tonus
topo (surface) topic, topical, topographic, topology
torsi (twist) torque, torsion, tortellini, tortuous
tox(i) (poison) antitoxin, intoxicate, toxic, toxemia, toxicology
trache (windpipe) trachea, tracheal, tracheobronchial, tracheotomy
tract (drag, draw) attract, extract, protract, retract, tractor, traction
trapez (four-footed) trapeze, trapezium, trapezoid
trauma (injury) trauma, traumatic, traumatize
tribu (press, tribe) retribution, tribulation, tribunal, tribune
trit (worn, frayed) attrition, trite, triturate
trope (turn toward) geotropic, hydrotropic, phototropic
trophy (feed, eat) atrophy, autotrophy, dystrophy, hypertrophy
tropism (movement or growth in) geotropism, hydrotropism, phototropism
trud (thrust) extrude, intrude, protrude
trunc (maim) truncate, truncheon
tuber (swelling) tuber, tubercle, protuberant, tuberculosis
turb (mob, muddled) disturb, turbidity, turbulent
twi (two) twain, twice, twin, twilight
tympan(o) (drum) tympani, tympanic, tympanum
typ (style, print) atypical, prototypical, typical, typography
ule (small) granule, module, vestibular
ulti (beyond) ulterior, ultimate, ultimatum
ulul (howl) ululate, ululation
umbilic (navel) umbilical, umbilicus
umbra (shadow) penumbra, umbrage, umbrella
undu (wave) inundate, undulate, undulation
ungu (hoof) ungula, ungulate, unguis
urb (city) urban, urbane, urbanize, suburb
uro (urine) urethane, uric, urinal, urine, urology
usu (use) unusual, usual, usury, usurpation
uter (womb) intrauterine, uterine, uterus
uti (use) utensil, utilitarian, utilize, utility
vacan (empty) evacuate, vacant, vacate, vacation
vacu (hole) vacuum, vacuole, vacuous
vade (go) evade, invade, pervade
vaga (wandering) vagabond, vagary, vagrant, vague
vagin (cup) invaginate, vagina, vaginal
vain (empty) vainglorious, vanity, vanish
vale (value, worth) equivalent, evaluate, valence, valiant, valid
vario (change, bent) variation, varicose, variegated, various
vas(o) (vessel) vasectomy, vasodilation, vascular, vasculature
vec, veh (carry) convect, convey, vehement, vehicle, vector
velo (swift) velocity, velocipede, velociraptor
ven (vein) intravenous, vena cava, venous
venal (sale) venal, venality, vendor
vera (true) veracious, veracity, verdict, verification, very
verb (word) verbal, verbalize, verbose, verbatim
verd (green) verdant, verdigris, verdure
verg (incline) converge, diverge, verge
vermin (worm) vermicelli, vermin, vermiform
vers (turn, direction) converse, inverse, obverse, reverse, transverse, versatile, version
vert (change, turn) advertise, convert, divert, invert, revert, versatile, vertigo
vesic (bladder) vesicant, vesicle, vesicular
vest (robe) divest, invest, vestment, vestry
vestig (trace) investigate, vestige, vestigial
via (road, through) deviate, devious, Via Dolorosa, viaduct
vibr (shake) vibrant, vibrate, vibrato
vice (in place of) vicar, viceroy, vice president
vin (grape) vinegar, vineyard, vintage, vintner
vir (slime, ooze) virology, virulent, virus
vis, vid (see) advise, revise, video, visage, vision, visor
viscero (guts) eviscerate, viscera, viscus
vit(a) (life) revitalize, vital, vitality, vitamins
vitr(e) (glass) in vitro, vitreous, vitrify, vitriol
vivi (alive) revive, revivify, vivacious, vivid
voc (call) invoke, revoke, vocal, vocation, vociferate
voli, volo (will) malevolent, volitional, volunteer
volt (turn) revolt, volt, voluble
volv (roll) convolute, devolve, evolve, involve, revolve
vor(e) (eat) carnivore, herbivore, omnivore, voracious
vot (vow) devote, vote, votive, votary
vuln (attack) invulnerable, vulnerable, vulnerability
xen(o) (stranger) xenobiotic, xenophobe, xenophile
zo (animal) zoology, zoophyte, zoon, zoospore
zygo (united, paired) heterozygous, zygomorphic, zygote
Suffixes
able (capable of, able) inflammable, notable, reliable
ac (pertaining to) hypochondriac, maniac
acean (class or order) crustacean, cetacean
aceous (of the nature of) herbaceous, sebaceous
acious (tending toward) gracious, rapacious, spacious
acy (state) democracy, legacy, lunacy, normalcy
ad (toward) cycad, monad, triad
age (state) blockage, heritage, marriage, sewage
agogy (leading) demagogy, pedagogy
al (pertaining to) facial, mental, nominal, physical, spiritual
ality (property of, condition of) causality, personality, reality
an, ian (belonging to, resembling) arcadian, Canadian, Hadean, hydrozoan
ance (the act of) avoidance, dominance, substance
ane (attribute) arcane, humane, mundane, urbane
ant (having, showing, or doing) combatant, merchant, penchant, peasant
ar (pertaining to) cellular, molecular, polar, scholar
arch (ruler) patriarch, matriarch, monarch
archy (rule, leadership) anarchy, monarchy, oligarchy
arian (age, sect, occupation) grammarian, librarian, octogenarian, vegetarian
arium (place for) aquarium, sanitarium, terrarium
ary, ery, ory (relating to) aviary, boundary, bribery, dictionary, illusory, library, victory
ase (enzyme) lactase, lipase, sucrase
asis (state of) cirrhosis, metastasis, psoriasis
ate (to cause, having) enervate, laminate, oxygenate, pronation, supination
ate (compound) carbonate, hydrate, silicate
atic (of the kind of) asthmatic, democratic, emphatic, erratic, somatic
ation (act of, condition of) intimation, perspiration, recitation, specialization
atory (characterized by, related to) ambulatory, circulatory, laboratory, observatory
cian (having a skill) clinician, musician, technician
cide (kill) insecticide, herbicide, homicide, patricide, genocide, suicide
cy (function, condition) deficiency, pregnancy, relevancy
dom (state, realm) boredom, freedom, princedom, wisdom
ectomy (cut out) appendectomy, thyroidectomy, tonsillectomy, vasectomy
ee (receiver of action) employee, payee, trainee
emia (blood issue) anemia, hypoglycemia, leukemia, toxemia
en (cause to be) harden, lighten, spoken, stolen
ence (process, state) emergence, luminescence, science
er, or (one who) baker, builder, governor, pollster, ranger, rover, senator
escent (becoming) luminescent, phosphorescent
ess (female) actress, princess, waitress
fer (carry) aquifer, conifer, ferry, transfer
ferous (bearing) coniferous, crystalliferous, pestiferous, soporiferous
fic (making) beatific, horrific, malefic, scientific
ful (full of) colorful, grateful, hopeful, respectful
fy, ify (make, cause to) exemplify, purify, putrefy, simplify, stupefy
genic (creating) carcinogenic, eugenic, mutagenic, photogenic
hood (order, condition) brotherhood, falsehood, neighborhood, womanhood
ia (condition) anorexia, bulimia, hypochondria, hysteria
iac (pertaining to) hypochondria, maniac
ial (relating to) arterial, cranial, medial, pericardial
ian (skilled in, resembling) comedian, librarian, reptilian
iasis (disease) paralysis, psoriasis, elephantiasis
iatric (treatment) geriatric, pediatric, psychiatric
iatry (treatment) optometry, podiatry, psychiatry
ible (capable of being) credible, mobile, risible, terrible
ic (pertaining to, having) atomic, biotic, frenetic, manic, medic
ician (specialist) magician, musician, physician, technician
ics (technology) acoustics, mathematics, physics
id (quality) acid, gelid, limpid, tepid
ify (become) petrify, rectify, sanctify, stratify
ile (relating to) compile, docile, senile
ing (act of) cleaning, hunting, living, regretting
ion (process of) extinction, fusion, reversion
ior (pertaining to) junior, savior, senior
ious (full of) bilious, cautious, religious, rubiginous
ish (of, somewhat) smallish, yellowish
ism (condition, belief) alcoholism, communism, socialism
ist (one who specializes in) dermatologist, optimist, optometrist
istics (science of) ballistics, linguistics, statistics
ite (nature of) stromatolite, stalactite, trilobite
itis (inflammation) appendicitis, arthritis, bronchitis, hepatitis
ity (state) formality, parity, reality
ium (element, chemical) barium, calcium, potassium
ive (tending toward) disruptive, expressive, pensive
ization (result of making) de-Stalinization, industrialization, organization
ize (cause to be) idealize, ionize, metastasize, realize
less (without) hopeless, needless, timeless, worthless
ling (smaller) duckling, hatchling, sapling
ly (manner) chronologically, happily, publicly, quickly
ment (act of, related to) ailment, fragment, government, movement
ness (quality) correctness, helpfulness, wellness
ologist (one who studies) anthropologist, biologist, entomologist, psychologist
ology (study of) anthropology, biology, entomology, psychology
or, er (one who) accelerator, doctor, governor, orator, rector, renter
ory (place) dormitory, factory, laboratory
ose (sugar ending) fructose, glucose, lactose, ribose, lactose, sucrose
osis (state, disease) arterioslerosis, prognosis, thrombosis, neurosis, psychosis
otic (affected with, producing) antibiotic, neurotic, symbiotic
otomy (incision) lobotomy, tracheotomy
ous (containing, pertaining to) analogous, bulbous, dexterous, porous, rigorous
ship (rank, quality) courtship, readership, relationship, scholarship
sis (state, process) hypnosis, mitosis, psychosis, trichinosis
some (like, leading to) gruesome, lonesome, twosome
ster (person associated with) gangster, mobster, youngster
th (ordinal number) tenth, hundredth, thousandth, millionth
ty (condition, state) conformity, exclusivity, realty
ular (resembling) cellular, circular, singular
ure (act, process) erasure, procedure, legislature
vious (characterized by) envious, previous, obvious
ward (in the direction of) downward, inward, outward, upward
where (location) anywhere, everywhere, nowhere, somewhere
wise (direction, regarding) clockwise, otherwise
y (inclined to) cheery, curvy, grouchy