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
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
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