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siblings; brothers and sisters
brothers
siblings-in-law; brothers-in-law; sisters-in-law
mate; friend
兄弟は三人いるんだよ。
I have three siblings, you know.
兄弟で旅行に行くのは久しぶりだ。
It's been a while since I traveled with my siblings.
小さい頃は兄弟げんかばかりしていたのが懐かしい。
I miss how we siblings used to fight all the time as kids.