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1、四级常用词根及前缀、后缀1.常用词干（68个）ag, act做 agent, active; aster, astro星 disaster, astronomy;audi听 audience, audio-visual(AV) ; cap,cept,ceive拿、取 capture, receive;bio生命 biochemist, antibiotic; cede,ceed,cess行、移动procedure, successive;cide, cis切，杀 suicide, decision; clued, clus闭合 include, exclusion;cur, curr跑 occ
2、ur, currency; cred相信 creditor, incredible;cycle圆、环 bicycle, recycle; fac,fic,fect,fact做、制affect,fiction,infect;dict, dic说 dictionary, indication; duct, duc引导 educate, conduct, prouuce;fer运送、带 transfer, conference; flect, flex弯、曲 reflect, flexible;flu流fluid, influence, fluent; gen起源、种类、人种intelligence
3、, generation;geo地球、土地geography,geometry; grad, gress走gradual, aggressive;gram写、记录grammar, telegram; graph写、记录; photo光 photograph;ject 投、掷、抛reject, project, injection;med中间immediately, medium;lect, leg挑选、采集、读elect, collect, legend;mob, mot, mov 移动automobile, promotemani,manu手manual, manipulate; miss,
4、mit送、派、放开transmit, permit;pel推、逐expel, propeller; pend悬挂indispensable, suspend;phon声microphone, phoney; pon, pos放置postpone, compose;port搬运、带transport, portable; rupt裂、破坏interrupt, rupture;scribe写describe, prescribe; spec, spect,spic看perspective, respective;volv转、滚动revolve, revolution; tract拖、拉、吸引tra
5、ctor, attract, distraction;vid, vis看见evident, invisible; tend,tens,tent伸张、倾向extend, intense2.常用前缀（49个）anti-反、抗、对立antisocial, antibody; auto-自己/动的autobiography, autonomous;be-使得、视作become, belittle; bi-两，双面bilingual, bimonthly;centi-百century, centigrade; co-共同，联合coordinate, cooperate;con-,col-,com-,co
6、r-与、和、共、全colleague, combination, conform, coordinate;contra-相反、针对contradiction,contrary;counter-反、逆对、等counteract, counterpartde-取消、脱离、向下decline, departure;dis-否定、除去discriminate, disorder;en(m)-使成为、使进入enable, enclose; ex-向外、出自、超出、离开exceed, excludeextra-越出、超过extraordinary, extreme;fore-前面、预先forehead,
7、forecast;in(m)-,il-,ir-不，无，非illegal, important;in-在里，内部inclusive, indoor;inter-互相、在中间interaction, intervene;intra(o)-内部、向内introduce, introvertmacro-大的、宏观的macroeconomics; mal-坏、恶、不良maltreat, malnutritionmicro-微小的、微量的microphone, microwave;mid-中部、当中midland, midwife;mini-极小的、极短的minibus, minimum; mis-错、不
8、当、相反misery, mismatchmono-一、单一的monotonous, monopoly; multi-多倍的multiple, multitude;non-非、无、不nonsense, non-stop; out-超出、在外outstanding, outlive;over-在上面、越过overwhelming, overtake; poly-多，众polysyllable, polytechnic;post-后postgraduate, postpone; pre-预先、前precedence, predominant;psudo-伪、假、拟pseudonym, pseudos
9、cience;re-又、再、往后replace, replenish;semi-半、部分的semiconductor, semi sphere;sub-下一级、次要subordinate, substitutesuper-上方的、超过的superfluous, supervisor; tele-远的、远距离telephone, telescopetherm(o)-热、热电的thermos, thermometer; trans-横越、通过transplant, transmit;tri-三、三次tricycle, triangle, triple; ultra-在之外、极端、过分ultravi
10、olet, ultrasonic;un-不、非、相反unknown, unsay; uni-单、一uniform, unity, universal;vice-代替、代理、付 vice-president, vice-principal.3.常用后缀（63个）1）n.后缀（33个）-age 状态、行为、集合 shortage, baggage; -al动作、人、事物refusal, professional-ance, -ence状态、性质、行为 entrance, reliance, correspondence;-ant, -ent人，物inhabitant, pollutant; -ar
11、, -er, -or人banker, scholar, sailor;-ery, -ary, -ory,-ry 人、地点、学科、集合secretary, library, history, shrubbery, scenery;-dom范围、状态kingdom, freedom; -ee动作的承受者 refugee, referee;-eer从事的人engineer; -ese某国的人、预言Japanese;-ess女性hostess, actress; -hood状况livelihood, neighborhood;-ian人 magician, physician; -ics学科 ling
12、uistics, athletics;-(s)ion,-(a)tion状况、行为presentation, intuition;-ism主义materialism, optimism; -ist主义者dentist, Buddhist-th结果、过程length, warmth; -(i)ty多抽象名词的性质、状态ability, loyalty;-ment行为、状态、性质enjoyment, argument, government, payment;-ness性质、状态sickness, blindness; -ology学科psychology, physiology;-ship性质、状
13、况、状态hardship, leadership;-ure性质、状况、状态pleasure, pressure;2）v.后缀（7个）-ate使irritate, originate;-ize, -ise, -yze, -yse化modernize, normalize, analyze;-en 使变成sharpen, hasten, lengthen;-ify 使成，使化simplify, amplify, diversify;3）adj.后缀（20个）-able, -ible能（为）的sensible, permissible;-al 具有性质的 ignorant, consistent,
14、passionate, fortunate;-ary, -ory与相关的imaginary, obligatory; -ed有的wooded, pleased;-en有质的，似的wooden, golden; -free免于的carefree, duty-free;-ic(al)类似的，具有的poetic, energetic;-ful充满的cheerful, faithful;-ive表倾向，关系，特征collective, destructive;-ish似的childish, selfish, foolish;-less没的shameless, fearless; -like似的womanlike, warlike;-ly有特征的roughly, leisurely; -ous充满的dangerous, precious;-some有性质的bu
