buddy哥们儿; colleague同事/同僚; confidante闺蜜/红颜知己(女性); intimate至交; mentor导师/指导者; sworn brother结拜兄弟; superior/boss上司/老板; partner搭档; couple情侣; companion同伴; pen pal笔友; comrade-in-arms战友; fellow-apprentice师兄弟; bosom friend知心朋友
