=Ad= (=ac=, =af=, =ag=, =al=, =am=, =an=, =ap=, =ar=, =as=, =at=, =a=), to: adore, advise, accord, annex, accuse, accede, allude, allusion, announce, appear, assent, attend, aspire, affirm, affix, aggrieve, annul, ammunition, apparent, arrive, assume, assault, assumption, attend, attentive, attention, assimilate, attain, ascribe, avow. =Am= (=amb=), round; ambient, amputate, ambition, ambiguous. =Ante= (=anti=), before; antedate, antenuptial, antenatal, antechamber, antediluvian, anticipate. =Circum= (=circu=), round; circumlocution, circumnavigate, circuit, circumvent, circuitous, circulate, circumference. =Con= (=col=, =com=, =cor=, =co=), together with; consonant, connect, contend, conduct, compact, compound, commend, collision, collect, correct, corrupt, co-heir, coerce. =Contra= (=contro=, =counter=), against; contradict, contravene, controversy, controvert, contraband, counterfeit. =De=, down or from; denote, describe, depart, descent, devise, demure. =Dis= (=dif=, =di=); disjoin, difficult, diffuse, divide, differ, dilute, dissent. =Ex= (=ef=, =e=), out of; extort, exhume, efface, educe, extrude, extol, effect, education. =Extra=, beyond; extraordinary, extravagant, extraneous. =In= (=il=, =im=, =ir=, =em=, =en=), into; invade, incite, induce, illusion, illude, improve, impulse, impel, irruption, embrace, endure, encourage, embroil, irradiate, innate. =In= (=ig=, =il=, =im=, =ir=), not; insecure, ignoble, illiterate, inconvenient, incurable, incapable, incapacitate, immortal, irregular, improper, illegitimate, irrational, innocent, infant. =Inter= (=intel=, =enter=), between; intercourse, intelligent, interfere, interdict, enterprise, entertain, interrupt. =Intro=, within; introduce. =Ob= (=oc=, =of=, =op=, =os=), against; oblige, obtain, object, occur, offend, oppose, occult, offer, ostentation. =Pene=, almost; as, peninsula. =Per= (=pel=), through; perform, permit, pellucid, pertain. =Post=, after; postpone, posthumous. =Præ= or =pre=, before; prelection, preface, prevent, precede, premature, predict. =Præter= or =preter=, beyond; preternatural, preterite. =Pro= (=por=, =pur=, =pol=), forth, on or before; proceed, pollution, portend, purvey, portrait, purloin, purchase, pronoun, purpose. =Re= (=red=), back; refute, result, redolent, redound, reduce, redeem. =Retro=, backwards; retrograde, retrospect. =Se= (=sed=), aside or apart; select, seclude, secede, seduce, sedition. =Sub= (=suc=, =suf=, =sug=, =sup=, =sur=, =sus=, =su=), under, up from below; subject, suspect, succeed, suffer, suggest, suppose, suspend, suspect, succinct, suppress, surrogate, susceptible, subdue, suffuse, subtract, succour, supplant. =Subter=, beneath; subterfuge.