1Violence, assault, or rowdy behavior — general acts of physical force or disorderly conduct.
昨夜、駅前で乱暴な事件があり、警察が出動した。
There was a violent incident in front of the station last night, and the police were dispatched.
酔った客が店員に乱暴を働いた。
A drunk customer assaulted the store clerk.
子供たちが教室で乱暴を始めたので、先生が止めに入った。
The children started roughhousing in the classroom, so the teacher stepped in to stop them.
2Rough, coarse, reckless, or rude — describes handling, language, or manner that lacks care or courtesy.
彼は乱暴な運転をして何度も注意されている。
He has been warned multiple times for reckless driving.
荷物を乱暴に扱うと壊れてしまうよ。
If you handle the luggage roughly, it'll break.
あの先輩は言葉遣いが乱暴なので、少し苦手だ。
That senior's language is quite rough, so I'm a bit uncomfortable around them.
3A euphemistic, somewhat dated or legal term for rape or sexual assault.
彼は女性に乱暴を働いたとして逮捕された。
He was arrested on suspicion of sexually assaulting a woman.