buddy 哥们儿; BFF(best friends forever)闺蜜; confidante 红颜知己; colleague 同事; intimate 至交; sworn brother 结拜兄弟; partner 搭档; companion 同伴; pen pal 笔友; comrade-in-arms 战友; bosom friend 知心朋友; childhood sweetheart 青梅竹马
