1) dis(not, the opposite of) disadvantage, dislike, disagree, disappear, disarm, disaster, disastrous, disappoint, disable, disability, discharge, disclose, discount, discourage, discover, discovery, discrepancy, disease, disgrace, disguise, disgust, dishonor, dishonest, dislike, dismay, disorder, dispatch, disperse, displace, displacement, displease, disregard, dissatisfy, distort , distract, disintegrate, isparage, dispassion, disproportionate
    2) in- (not, in, into) inability, incorrect, inability, incapable, indirect, inhuman, injustice, informal, inside, include, inclusive, income, increase, increasingly, incredible, indefinite, independence, independent, indifferent, indirect, indispensable, individual, indoor, inertia , inevitable, infamous , infinite, inhabit , inhabitant, inherent , inject, inland , inlet , inner, innocent, innumerable , input, inquire, inquiry, insane, insensitive, insert, inside, insight, insist, inspect, inspiration , inspire, install, installation, installment , instance, instant, instinct, insulate , intense, interior, internal, into, intrinsic, invade, invalid , invaluable , invariably , invasion, invert , investigate, invisible, involve, inward, incomplete, indecisive, inedible, inept, inevitably, infection, infirm, injection, innate, insatiable, insecurity, insider, insidious
    3) im- (not, in, into) impossible, imbalance, immature, immoral, impatient, implicit , impress, impression, import, immigrate, imprison, immerse
    4) il- (not) illegal, illiterate, illogical ir- (not) irregular, irresponsible, irrespective
    5) un- (not) unable, uncover, undo, undoubtedly, undress , uneasy, unemployment , unexpected, unfold , unfortunately, unimportant, unlike, unload, unusual, unaware, enlightened, unparalleled, unsustainable,
    6) non- (not) nonsmoker, nonexistence, non-cooperation, nonstop, nonmetal, nonresident, nonsense, nonfundamentalist, nonspecialist
    7) mis- (wrong, wrongly) mislead, misspell, misstep, misfortune, misuse, misguided, misinformation
    8) de- (showing the opposite, to remove, to reduce) deform, deface, demobilize, destruction, deforest, denationalize, depress, depression, decode, decrease, degenerate , degrade , descend, descendant , descent
    9) pre- (before, in advance) prefix, pre-historic, precaution, precede , preceding, preclude , predecessor , predict, predominant , preface, prejudice, preliminary, premature , premier , premise , premium , preparation, prepare, prepay, preside , president, presumably, presume , pretext , prevail, prevent, previous, prewar, preconception, prediction, prescientific, presumptively
    10) ante-, (before, in advance) anteroom, ante-Christian, antemeridian, anticipate, antique
    11) fore- (in advance, before, in or at the front) forearm, forehead, foreman, foretell , foresee , forefather , foreleg, forerunner , fore , foremost, forecast, forewarn
    12) ex- (out, out of, former) ex-minister, ex-president, ex-Soviet Union, ex-wife, export, exclude, exclusive, excursion, exhibit, exile , exit, exotic , expand, expansion, expedition , expel , expend , expenditure , expense, explode, explosion, explosive, expose, exposition , exposure, express, expression, extend, extension, extensive, exterior, external, extinct, extra, extract
    13) post- (later than, after) postgraduate, postwar, postmeridian, postpone, postscript
    14) sub- (under, below, less important) sub, subject, subway, subtitle, subdivide, submarine , sub-zero, submerge, submit, subordinate , subscribe , subsection, subsequent, subsidiary , subsidy , substance, substantial, substitute, subtract, suburb, subconsciously, subtly
    15) infra- (below in a range, beyond) infrastructure , infrared
    16) re- (again, back to a former state) react, reaction, recall, recede , receipt, recipient , reclaim , recognize, recognition, record, recorder, recover, recovery, recreation, recur , recycle , redundant , reflect, reflection, reflexion, reform, refrain , refresh, refreshment , refund , refute , reinforce, reject, remember, remind, removal, remove, renaissance , renew, repay , repeat, repeatedly, repel , repetition, replace, replacement, represent, representative, repression , reproduce, respect, respond, response, responsibility, responsible, restore, resume, return, reunion , revise, revive
    17) co-, col-, com-, con-, cor- (with together) co-existence, cooperative , co-author, coalition , coherent , coincide , coincidence , collaboration , colleague, collide , collision, collocation, compassion, compassionate, concentric, confederation, conjoin, coordinate, correlate, correlation, correspond
    18) inter- (between, among) interchange, interchangeable, interdependent, interpersonal, interview, interact , interaction, intercourse , interface , interfere, interference, Internet, interrupt, interval, intervene
    19) macro- (large) macroeconomics , macrocosm , macrostructure
    20) micro- (extremely small) microcomputer, microeconomics , microscope, microphone, microsurgery, microelectronics, microbiologist
    21) super- (greater or more than) super, supermarket, supersonic , superman, superpower, supernatural, supervise , superb, superficial, superintendent , superior, superiority , supreme, supersystem
    22) sur- (more than, beyond) surplus, surtax, surface, surpass , surround, survival, survive, suspect
    23) ultra- (beyond, very, too) ultramodern, ultrasound, ultra-violet
    24) auto- (of or by oneself) auto, autocriticism, autoland, automobile, automation , automatic, autobiography , autonomous , autonomy
    25) mal- (bad, badly) malfunction, maltreat , malnutrition , malpractice
    26) tele- (at or over a long distance, by or for television) telegram, television, telegraph, telephone, telecommunications , telescope, telescreen, teleswitch, televise
    28) semi-, hemi- (half) semicircle, semiconductor, semi-colony , semifinal, hemisphere
    29) uni-, mono- (one) uniform, unify , union, unique, unit, unite, unity, universe, universal, university, monologue , monoplane, monopoly , monotone, monotonous , carbon monoxide
    30) bi-, di- (two) biweekly, bicycle, bilateral , billion, bilingual, dialogue, carbon dioxide
    31) tri- (three) tricycle , triangle, triangular, trilogy , triple, trigonometry
    32) quadri-, quadru- (four) quadruple, quadrangle
    33) penta- (five) pentagon, Pentagon, Pentium
    34) hexa- (six) hexagon, hexangular mill- (thousand) millennium, millimeter
    35) sept- (seven) September, Sept-Wolves nona- (nine) nonagon, November
    36) octa- (eight) octagon, octave, octopus, October 38) deci-, deca- (ten) decade, decimal
    39) centi- (hundredth part) centigrade, centimeter, centipede, century
    40) kilo- (thousand) kilo, kilometer, kilogram (me), kilowatt
    42) multi- (many) multipurpose, multinational, multiple, multiply, multitude
    43)counter-,anti-,contra- (opposite, against counteract, counterattack, counterclockwise, counterrevolutionary, antibiotic, antigravity, antimatter, antiwar, antinuclear, contradict , contradiction, contramissile, contranatural, contrary, contrast, anticonsumerism
    44) mini- (smallest, short) minibus, miniskirt, minimum, minister, ministry, minor, minority, minute
    45) max- (greatest) maximum, maximal, maximize
    46) out- (outside, beyond) outdo, outwit, outlive, outnumber, outdoor, outstanding, outskirts , outward, outcome, outer, outing , outline, outlook, output, outrage , outside
    47) over- (too much, above, additional) overwork, overuse, overtake, overpass , overthrow , overturn , overall, overdue , overhead, overhear , overlook, overseas, overtime
    48) trans- (across, on or to the other side of) transaction , transatlantic, transcend , transfer, transform, transistor , transit , transition , translate, translation, transmission, transmit, transmitter, transparent, transplant, transport, transportation
    49) under- (too little, below) underdevelop, underdevelopment, underestimate, undergraduate, underground, underlie , underline, undersea, underlying , undermine , underneath, underwear
    50) neo- (new) neo-Nazism, neolithic
    51) be- (cause to be or have) befriend, belittle
    52) bio- (life) biology, biography , autobiography, antibiotic, biochemistry, biosphere, biomedical
    53) en- em- (cause to become, put into the stated condition) embody, empower, endanger, enlarge, enrich, encompass, enthrone, entrench
    54) extra- (outside, beyond) extracurricular, extraordinary
    55) mid- (middle) midday, midnight
    56) poly- (many) polycentric, polydirectional, polysyllabic
    57) pseudo- (not real, false) pseudomemory, pseudonym, pseudoscience
    58) thermo- (heat) thermochemistry, thermometer
    59) vice- (next in rank below) vice-chairman, vice-president
    60) aero- (air) aerial , aeroplane, aeronautics, aerospace
    61) cross- (across, going between the stated things and joining them) cross-country, crossbreed
    62) intra- (inside, within; into) intracity, intra-department, intranet
    63) pro- (in favor of, supporting) pro-America, pro-abortion
    64) self- self-employed, self-taught
    65) step- (not by birth but through a parent who has remarried) stepmother, stepchildren