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