乱暴

1. Origins, structure, and basic meaning

• Structure: 乱暴, read らんぼう, describes rough actions or rude behavior and speech.
• Basic usage: In 弟は扉を乱暴に閉めて部屋へ戻った。, the word describes the rough way the brother closes the door.

2. Common pitfalls and similar expressions

• Actions and speech
  • 乱暴に閉めて describes a rough action, while 乱暴な言い方 describes rude speech. Its use for speech does not necessarily imply physical violence.