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friend; companion; comrade; pal
accompaniment; companion (e.g. book); complement; accessory
彼は私の幼なじみの友なんだ。
He's my childhood friend.
友を大切にすることが大事だよ。
It's important to value friends.
親友とは何でも話せる仲なんだ。
I can talk about anything with my best friend.