1、常用前綴?
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?