PREFIX
(用于構成動詞或名詞)表示“和…一起”，“共同”，“聯合”
co- is used to form verbs or nouns that refer to people sharing things or doing things together.
例句
...commercial co-operation between the two countries...
兩國之間的商業合作
He co-produced the album with Bowie.
他和鮑伊聯袂打造了這張專輯。