1 ab-,abs- off; away from abandon abdicate abduct abhor abnormal abortabrupt abscond absent absolve absorb abstain abuse 2 ad- toward; to adapt addict address adept adhere adjacent adjourn adjust administer admire admit admonish adopt adorn adrift advance advantage adventure adverse advertise advice advise advocate 3 anti- against; opposed to antiaircraft antibiotic anticlockwise antidote antipathy antiseptic 4 bi- two bicentenary bicycle biennial bilateral bilingual binary binoculars biplane bisect 5 circum- around; on all sides circumference circumlocution circumscribe circumstance circumvent 6 contra-, counter- against; contrary contraband contraception contradition contradictory contrary contrast contravene counteract counterattack counterballance counterfeit7 de- away; down; reversal of an action; removal decay declare decline decompose decrease deduce defame defeat defect defenddeficiency deflect deform degenerate degrade delete deliberate delinquent demolish denounce deny depart depend depress descend destroy detach devalue deviate 8 dif- away from; undoing of an action; not differ different difficult diffidentdiffuse 9 dis- not; negative disable disadvantage disagree disappear disappoint disapprove discard discern discharge disclose discomfortdiscount discourage discover discrepancy discrete discriminate disgrace disguise disgust dishonest dishonourdisillusion disintegrate dislike dismantle dismay dismissdisorder dispatch disperse displace displease disposedispute dissatisfy dissect disseminate dissipate dissolve distil distinct distinguish distort distract distress distribute disturb10 en- put into; cause to be enable enact enchant enclose encounter encourageencroach endanger endorse endow endure enforce engageengender engross engulf enhance enjoin enlarge enlightenenquire enrich enroll enslave ensure entangle enticeentitle entrance entreat entrust envelop 11 ex-former; out of; not any more; from exaggerate excavate exceed excel exceptexchange excite exclaim exclude excursion excuse executeexhale exhibit exsile exist exit expand expect expel expendexpire explain explode exploit explore export expose expressextend exterior external extinct extinguish extract extricate12 extra-beyond; outside of extraneous extraordinary extravagant 13 fore-before; in front of forecast forefinger foregoing forehead foremost forerunner foresee forestall foretell14 hemi-half hemicycle hemisphere15 homo-same homogeneous homosexual 16 hyper-over; excessive hypercritical hypermarket hypertension17 hypounder; beneath hypocrisy hypothesis18 il-, im-, in-, ir-not; negative illegal illegible illegitimate illicit illiterateillogical immature immemorial immobile immoral immortal immune impartial impatient impertinent implicitimply impolite impossible impotent impracticable improperimpure inaccessible inaccurate inadequate incapable incessant incognizable incoherence incoherent incopatible incompetent incomplete inconceivable inconvenient incorrect incorruptible incredible indefininte independent indestructible indifferent indirect indispensable inefficient inevitable inexpensive infallible infinite innocent innumerable inorganic insufficient invalid invariableinvisible 19 infra-beneath infrared infrasonic infrastructure20 inter-between; among interact intercede intercept intercourse interface interfere intermediate international interpret interrogate interrupt intersect interval intervene interview 21 intra-, intro-inside; within intracity intramolecular intramural introduce introspective introvert 22 macro-large; long macrobiotic macrocosm 23 mal-bad; ill malformation malfunction malicious malnutrition24 micro-small microcomputer microfilm microphone microprocessor microscope microwave 25 mini-of small size miniature minibus minimize minimum 26 mis-indicate an error or mistake; badly mischief misfortune mislead misspellmistake mistreat misunderstand misuse27 multi-many multiform multiple multiply multitude 28 neo-new neocolonialism neorealism 29 non-not nonfiction nonflammable nonsmoker 30 ob-, oc-, of-, op-toward; to; against; completely object obligate oblige obscureobserve obsess obsolete obstacle obstinate obstruct occupy offend oppose oppress 31 omni-general; public omnibus omnipotence omnivorous 32 out-be superior; do more than outbreak outcome outdoor outer outlawoutlet outline outlive outlook output outrageous outrunoutset outside outskirts outspoken outstanding outward33 over-in excess; too much overall overcast overcome overdraw overdueoverestimate overflow overhead overhear overlap overload overlook overnight override