In each set you'll find (1.) a list of fairly familiar words that embody the root and (2.) a list of less familiar words that embody it.
Ag, act, ig (carry on, do, drive)
1. agent, agitate, agile, act, actor, actuate, exact, enact, reaction, counteract, transact, mitigate, navigate, prodigal, assay, essay;
2. agenda, pedagogue, synagogue, actuary, redact, castigate, litigation, exigency, ambiguous, variegated, cogent, cogitate.
Anim (life, breath)
1. Animosity, unanimous, magnanimity;
2. animate, animadvert, equanimity.
1. Annual, annuity, anniversary, perennial, centennial, solemn;
2. superannuate, biennial, millennium.
1. Audit, auditor, auditorium, audience, inaudible, obey;
2. aurist, auricular, auscultation.
1. Automatic, automobile, autocrat, autobiography;
2. autograph, autonomy.
Burn, brun, brand (burn)
(1 and 2 combined) burn, burnish, brunette, brunt, bruin, brand, brandish, brandy, brown.
Cad, cas, cid (fall)
1. cadence, decadent, case, casual, casualty, occasion, accident, incident, mischance, cheat;
2. casuistry, coincide, occidental, deciduous.
Cede, ceed, cess (go)
1. cede, recede, secede, concede, intercede, procedure, precedent, succeed, exceed, success, recess, concession, procession, intercession, abscess, ancestor, cease, decease;
2. antecedent, precedence, cessation, accessory, predecessor.
Ceive, ceit, cept, cip, cap(t) (take)
1. receive, deceive, perceive, deceit, conceit, receipt, reception, perception, inception, conception, interception, accept, except, precept, municipal, participate, anticipate, capable, capture, captivate, case (chest, covering), casement, incase, cash, cashier, chase, catch, prince, forceps, occupy;
2. receptacle, recipient, incipient, precipitate, accipiter, capacious, incapacitate.
Cant (song, sing)
1. Cant, descant, incantation, chant, enchant, chanticleer, accent, incentive;
2. canto, canticle, cantata, recant, chantry, chanson, precentor.
Cent (one hundred)
1. Cent, per cent, century, centennial;
2. centenary, centime, centurion, centimeter, centigrade.
1. Chronic, chronological, chronicle;
2. chronometer, synchronize, anachronism.
1. Corps, corpse, corporal, corpulent, corporation, incorporate;
2. corpus, habeas corpus, corporeal, corpuscle, Corpus Christi.
(1 and 2 combined)
Creed, credulous, credential, credit, accredit, discredit, incredible.
Cresc (grow, increase)
1. Crescent, increase, decrease, concrete, recruit, accrue, crew;
2. crescendo, excrescence, accretion, increment.
1. Cure, secure, procure, sinecure, curious, inaccurate;
2. curate, curator.
Cide, cis(e) (cut, kill)
1. decide, suicide, homicide, concise, precise, decisive, incision, scissors, chisel, cement;
2. patricide, fratricide, infanticide, regicide, germicide, excision, circumcision, incisors, cesura.
Dic, dict (speak, say)
1. dedicate, vindicate, indication, predicament, predict, addict, verdict, indict, dictionary, dictation, jurisdiction, vindictive, contradiction, benediction, ditto, condition;
2. abdicate, adjudicate, juridical, diction, dictum, dictator, dictaphone, dictograph, edict, interdict, valedictory, malediction, ditty, indite, ipse dixit, on dit.
(1 and 2 combined)
Indignity, indignation, undignified, condign, deign, dainty.
Duce, duct (lead)
1. induce, reduce, traduce, seduce, introduce, reproduce, education, deduct, product, production, reduction, conduct, conductor, abduct, subdue;
2. educe, adduce, superinduce, conducive, ducat, duct, ductile, induction, aqueduct, viaduct, conduit, duke, duchy.
1. Durable, endure, during, duration, obdurate;
2. durance, duress, indurate, perdurable.
1. error, erroneous, erratic, errand;
2. errata, knight errant, arrant knave, aberration.
Fact, fic(e), fy, fect, feat, feit (make, do)
1. fact, factory, faction, manufacture, satisfaction, suffice, sacrifice, office, difficult, pacific, terrific, significant, fortification, magnificent, artificial, beneficial, verify, simplify, stupefy, certify, dignify, glorify, falsify, beautify, justify, infect, perfect, effect, affection, defective, feat, defeat, feature, feasible, forfeit, surfeit, counterfeit, affair, fashion;
2. factor, factotum, malefaction, benefaction, putrefaction, facile, facsimile, faculty, certificate, edifice, efficacy, prolific, deficient, proficient, artifice, artificer, beneficiary, versification, unification, exemplification, deify, petrify, rectify, amplify, fructify, liquefy, disaffect, refection, comfit, pontiff, ipso facto, de facto, ex post facto, au fait, fait accompli.
Fer (bear, carry)
1. transfer, prefer, proffer, suffer, confer, offer, referee, deference, inference, indifferent, ferry, fertile;
2. referendum, Lucifer, circumference, vociferate, auriferous, coniferous, pestiferous.
Fide (trust, believe, have faith)
1. fidelity, confide, confident, diffident, infidel, perfidious, bona fide, defiance, affiance;
2. fiduciary, affidavit, fiance, auto da fe.
1. Finite, infinite, define, definite, confine, final, in fine, unfinished;
2. definitive, infinitesimal.
1. Flexibility, inflexible, deflect, inflection, reflection, reflex;
2. circumflex, genuflection.
1. Fluent, affluent, influence, influenza, superfluous, fluid, influx, flush (rush of water), fluctuate;
2. confluent, mellifluous, flux, reflux, effluvium, flume.
1. Fort, forte, effort, comfort, fortitude, fortify, fortress;
2. aqua fortis, pianoforte.
Fract (break, broken)
1. Fraction, infraction, fracture, fragility, fragment, suffrage, frail, infringe;
2. diffract, refractory, frangible.
(1 and 2 combined)
Fugitive, fugue, refuge, subterfuge, centrifugal.
1. Refund, confound, foundry, confuse, suffuse, profuse, refuse, diffuse;
2. fusion, effusion, transfuse.
Editor's note: This section of EnhanceMyVocabulary.com is excerpted and adapted from Project Gutenberg's The Century Vocabulary Builder by Creever and Bachelor.