Translation

敵対的な / けんか腰の / 攻撃的な

Meaning

Belligerent means hostile, aggressive, and ready to argue or fight. It can describe a person, tone, crowd, or country. Compared with bellicose, it often sounds more directly confrontational.

Examples

• 客は次第にけんか腰になり、警備員が呼ばれた。
  The customer became belligerent, so security was called.
• その交渉は敵対的な口調で始まった。
  The negotiation began in a belligerent tone.