复习必备资料：09考研英语高频词汇常考前缀

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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