考研英语词汇常考词根汇总：前缀aero、anti、auto、be、bi
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