co-

pref

• ① 表「共同;相互;同等」等之意(★有下列三种写法:cooperate, coöperate, co-operate)1[加在名词之前]:coauthor; copilot2[加在形容词、副词之前]:cooperative; coextensive3[加在动词之前]:cooperate; co-operate; coexist4=com-(在元音或h, gn之前的变形)

• ② 【数】余,补:cosine