实用资料：考研英语词汇常考前缀(一)

dorm99

　　aero-：concerning the air of aircraft
　　plane—aeroplane
　　space—aerospace
　　anti-：against；opposite of
　　nuclear—antinuclear
　　matter—antimatter
　　war—antiwar
　　auto-：of or by oneself
　　biography—autobiography
　　criticism—autocriticism
　　be-：to treat as the stated thing
　　friend—befriend
　　little—belittle
　　bi-：two；twice；double
　　lingual—bilingual
　　cycle—bicycle

　　bio-：concerning living things
　　chemistry—biochemistry
　　sphere—biosphere
　　by-，bye-：less important
　　produce—by-produce
　　way—byway
　　centi-：hundredth part
　　grade—centigrade
　　meter—centimeter
　　co-：together，with
　　author—coauthor
　　exist—coexist
　　col-：(used before l ) together，with
　　location—collocation
　　com-：(used before b，m，p ) together，with
　　passion—compassion
　　con-：together，with
　　centric—concentric
　　federation—confederation
　　contra-：opposite
　　diction—contradiction
　　natural—contranatural
　　cor-：(used before r ) together，with
　　relate—correlate
　　respond—correspond
　　counter-：opposite
　　act—counteract
　　attack—counterattack
　　cross-：across；going between the stated things and joining them
　　country—crosscountry
　　breed—crossbreed
　　de-：showing an opposite；to remove；to reduce
　　code—decode
　　value—devalue
　　dis-：not；the opposite of
　　advantage—disadvantage
　　agree—disagree
　　honest—dishonest
　　em-：( used before b，m，p ) to cause to become
　　body—embody
　　power—empower
　　en-：to cause to become；to make
　　danger—endanger
　　large—enlarge
　　ex-：former ( and still living )
　　minister—ex-minister
　　wife—ex-wife
　　extra-：outside；beyond
　　curricular—extracurricular
　　ordinary—extraordinary
　　fore-：in advance，before；in or at the front
　　arm—forearm
　　warn—forewarn
　　il-：( used before l ) not
　　legal—illegal
　　literate—illiterate
　　im-：( used before b，m，p ) not
　　moral—immoral
　　possible—impossible
　　in-：not
　　direct—indirect
　　sensitive—insensitive
　　infra-：below in a range；beyond
　　red—infrared
　　structure——infrastructure
　　inter-：between；among
　　change——interchange
　　national——international
　　intra-：inside，within；into
　　city——intracity
　　department——intra-department
　　ir-：(used before r)not
　　regular——irregular
　　responsible——irresponsible
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