Must Know Word Roots for TOEFL / IELTS

ROOT
MEANING
EXAMPLES

ac, acr sour, sharp acute, acrid, acumen, acrimonious aero air aerodynamics, aerodyne, aerosol ag, act do, drive, move, impel agile, agent, act, agenda, reaction agr field agriculture, agrarian, agronomy alb white albino, albinism, albedo ali other alien, alibi, alias alt high altitude, altimeter, alto alter other, change alter, alternate, alternant ambul walk ambulatory, ambulant amic, am love, friend amity, amatory, amicable ampli large ampliation, ample, amplification anim mind, soul, spirit animate, animosity, magnanimity ani, enni year annals, anniversary, perennial apt, ept adjust, fit adapt, aptitude, inept api bee apiary, apian, apiarist aqu water aquatic, aquarium, aqueduct arm arm, weapon army, disarming, armory, armament art skill, craft, art artisan, artful, artificial aud, audit hear audible, audience, auditorium aug increase augment, augmentative aur gold aureate, aureole, auriferious avi bird aviary, aviatrix, aviculture bel, bell war bellicose, belligerent, rebel bene, ben well, good benefit, benefactor, benediction brev short, brief brevity, abbreviate, abridge bull boil ebullient, ebullition cand white, glowing incandescent, candle, candent cant sing cantation, cantata, cantilate cap, capt, cept, cip take capable, capacity, captious, reception, anticipate capit head capital, decapitate, per capita carn meat, flesh incarnate, carnal, carnivorous ced, ceed, cess move, yield, go recede, proceed, concession cent hundred century, centennial, centipede cern, cert perceive, separate, decide discern, ascertain, certify cid, dis cut, kill incision, homocide, fratricide cit summon, impel excite, citation, incite civ citizen, city civilian, civic, civilize, civility clam, claim shout, cry clamor, proclaim, exclamation clar clear clarify, clarity, clarinet, declare clin bend, lean decline, declension, inclination clud, clus, clau, clos shut, close conclude, closet, occlude, exclusion, claustrophobia cogn know, be acquainted incognito, recognize, cognizant commun common community, communion, communication copi, op abundance, wealth copious, opulent cord heart cordial, discord, accord, concord corn horn, point cornucopia, cornea, corniculate corp body corpuscle, corporation, corpulent cred belief, trust credible, credulous, credit cresc, cret rise, grow crescent, concrete, accretion cruc cross crucifixion, crucifer, cruciform culp fault, blame culpable, culprit, exculpate cupr copper cupreous, cuprous, cupric cur care, care for accurate, security, curator cur, curr, curs run, cours curriculum, concur, recurrent dec ten decimal, decimate, decennial dent tooth dentist, denture, indent dict say, speak, word diction, contradict, abdicate digit finger digitate, digitigrade, digital dign worth, worthy dignify, indignity, condign doc, doct teach, prove docile, doctrine, indoctrinate domin master dominate, domain, predominant dorm sleep dormant, dormitory, dormer du two duel, duet, duplicate duc, duct lead adduce, seduce, abduct, education dur hard, lasting durable, objurate, duration ego I, self egotist, egoist, egocentric equi, equ equal equality, equity, equinox err wander errata, erratic, aberration ev time, age medieval, longevity, primeval fabul story fable, fabulous, fabliau fac, fact, fec, fic do, make, put facile, facsimile, calefacient, defect, efficacious, factotem fer bear, yield, carry confer, defer, offer, fertile ferv boil, bubble fervor, perfervid, effervescent fid belief, faith fidelity, perfidious, infidel fin end, limit final, infinite, definitive firm strong, steadfast confirm, firmament, infirmary, affirm flor flower floral, florid, florescence, flourish flext, flex bend, twist flexible, circumflex, genuflect flu, fluct flow influence, flux, superfluous foli leaf foliate, foliage, foliaceous form form, shape conform, uniform, reformation fort strong fortify, fortitude, effort, force frag, fract break fragile, fragment, fraction, refract frat brother fraternity, fraternize, fratricide fund, fus pour, melt transfuse, suffuse, refund, foundry gest, ger carry, produce gestation, gesture, ingest, gerund grad, gress take steps, step, go, walk digress, gradient, aggression, egress, degrade, ingredient grat please, favor, thankful gratitude, gratuity, congratulate grav weigh, heavy gravity, gravitation, aggravate grex, greg flock, herd congregate, gregarious, egregious her, hes cling, stick adhere, coherence, adhesion herb grass herbivorous, herbalist, herbicide horr shudder at horrendous, horror, abhorrent hum be moist humidify, humidity, humidor ig fire igneous, ignite, ignescent irid, irido rainbow, iris of eye irridescence, iridic, iridectomy it go, travel exit, transit, circuit, itinerarv jac, ject throw, hurl, cast ejaculate, eject, rejection jud judge judicious, adjudicate, prejudice junct join juncture, disjunctive, adjunct jur swear conjure, abjure, perjury labor work laboratory, elaborate, laborious lact milk lactescent, lactiferous, lacteal langu feel weak languor, languish, languid latus wide, side latitudinarian, equilateral, latitude laud praise laudable, applaud, laudation leg law legislate, illegal, illegitimate leg, lig, lect gather, choose, read legible, eligible, lectern, college lev, leger light, rise levitation, elevate, levity lingu tongue, language linguist, lingulate, bilingual liter letter literal, alliterate, illiterate loc place locus, locale, allocate, location locu, loqu talk, speech colloquial, obloquy, location luc light transluscent, lucid, elucidate luna moon lunar, paralun, lunate, lunatic magn great, large magnitude, magnanimous, magnate mal bad malady, malevolent, malediction man, manu hand manacle, manicure, manual mar sea marine, maritime, submarine mater, matr mother maternity, matricide, matriarchy medi middle mediocre, mediate, medieval

memor memory memorial, remember, memorable merg, mers dip, plunge submerge, emergent, immersion meso middle mesomorph, mesosphere, mesozoic migr depart migratory, immigration, emigrant min less, little minus, minimize, minority mit, miss send admit, omit, missile, emissary mob, mo, mot, mov move mobile, remote, move, motor mon, monit warn admonish, monitor, monish monstr show demonstrate, remonstrate, monstrate mont mountain mount, amount, dismount mor, mort die, death moribund, mortuary, immortal multi many multitude, multiple, multifarious mur wall mural, immure mut, mutat change immutable, transmute, mutation natur nature natural, native, naturopathy nav ship, sail naval, navigate, circumnavigate neg deny negate, renege, negative nomen, nomin name nomenclature, nominee, cognomen nov new novelty, innovate, renovate nox harmful noxious, obnoxious, noxiousness num marry nubial, connubial, nuptials ocul eye ocular, oculist, binocular offic duty office, officious, officer omni all omnipotent, omnivorous, omniscient onus load, burden onus, onerous ora speak, pray orate, oratorio, oracular ord order disorder, ordinance, ordinary, ordain orn decorate ornate, adorn, ornament pac, pax peace pacify, Pax Romana, pacific par equal par, disparity, disparate, separate par make ready, shield prepare, repair, pare pater, patr father paternal, patrimony, patristic pecuni money percuniary, impecunious ped foot pedal, centipede, quadruped pel, puls drive, urge repel, compulsion, impulse pend, pens hand, weigh, pay expensive, pension, suspend, pendant pet seek, ask, strive for competitor, petulant, petition petr rock petrified, petrography, petroglyph pisci fish Pisces, piscary, pisciculture plan level plane, explain, explanation plen full plenty, plentitude, replenish plic, pli, ply fold, bend duplicity, replica, imply plumb lead(metal) plumbiferous, plumb, plumbeous pomi apple, fruit pomander, pomade, pommel pon, pos place, put postpone, proponent, deposit port carry porter, export, portable, comportment popul people popular, populous, population pot power impotent, omnipotent, potentiality prehend,prehens seize prehensile, apprehend, comprehension press press, force press, pressure, oppress, expression prim first primer, primitive, primeval prob good probation, opprobrium, prove propr one's own, fitting property, probity, proper quir, quis ask, seek inquire, inquistion, requisition quasi somewhat, seemingly quaisjudical, quasi, quasipublic radi ray radiant, radial, irradiate reg straighten, rule regiment, regal, interregnum, regicide rid, ris laugh ridiculous, deride, derision rog ask interrogate, rogation, derogative rupt break rupture, abrupt, interrrupt salv safe salvation, salvage, salvo sanct holy sanction, sanctuary, sanctimonious sang blood sanguine, consanguinity, sanguinary sci know science, conscious, prescient scrib, script write inscribe, transcribe, scriptures sed, sid, sess, sej sit, seat sedentary, supersede, sejant, sessile, session, assiduous seg, sect cut segment, sector, dissect semin seed seminal, seminiferous, disseminate sen old senior, senile, senescence, senate sens, sent feel sensory, sensuous, sentimental, sentient seq, secut, sue follow sequel, consequence, ensue, persecute serv keep, save, serve conserve, preserve, service, servant silv forest sylvan, silva, silviculture simil like similar, similitude, assimilate sist stand insist, persistence, desist sol, soli alone solitude, solitaire, desolate solid compact solid, consolidate, solder solv, solu, solut loosen, free solvent, soluble, absolute somni sleep somnambulate, somniferous, somnific son sound unison, resonance, dissonance spec, spic, spect look, see specimen, despicable, circumspect spir breathe aspire, perspiration, spirit sta stand, firm stable, establish, station, status string, strict bind tight stringent, restrict, stricture stru, struct build structure, construe, destruction suad, suas advise persuade, dissuade, suasion sud sweat sudorific, sudatorium, sudatory sum, sumpt take, spend, take consumption, presume, assume tang, ting, tig, tact touch tangible, tactile, contingent, contiguous, contact tempor time contemporary, temporal, extemporaneous teg, tect cover integument, protect, tegular ten, tin, tent hold tenure, retentive, continence tend, tens, tent stretch distend, tendency, pretense tenu thin tenuous, attenuate, extenuate terr, ter land terrestrial, subterranean, disinter test witness testify, testimony, testament torp numb torpid, torpor, torpedo tort, tors twist distort, contortion, torsion tract, tra draw, pull, drag traction, distract, train trib assign attribute, distribute, contribute trud, trus thrust intrusion, protrude, abstruse turb agitate turbid, turbulence, disturbance turg swell turgid, turgescent, turgor umbr shade umbrella, adumbrate, penumbra und wave undulant, inundate, abundant uni one unity, uniform, unison urb city urbanity, suburban, urbane vac empty vacant, vacuous, evacuate vad, vas go pervade, evasion, pervasive ven, vent come, go intervene, convene, event, prevent ver true verily, veracity, verisimilitude verb word verbal, verbose, verbiage verm worm vermicular, vermiculate vert, vers turn aversion, inadvertent, convent vest dress vesture, divest, vestment vid, vis see visual, evident, supervisor vinc, vict conquer convince, victor, invincible, evict vit, viv life, lively vitality, vitamin, vivid voc, vok call vocation, invoke, advocate vol wish volition, volunteer, malevolent volv, volu, volut roll, turn evolve, devolve, evolution, convolution vulg common vulgar, vulgate, divulge