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group; gang; bunch
「輩」 has other readings with different meanings.
あの輩には気をつけろ。
Watch out for that bunch.
同じ輩の仲間と飲みに行った。
I went drinking with people from the same group.
若い輩がまた騒いでいるので注意してきた。
The young crowd was making a ruckus again, so I went to warn them.