in league (with somebody)

成語所屬單字league

in league (with somebody) — 慣用語

1. Working together secretly with someone, often for a bad purpose.

1.慣用語
釋義

與某人勾結

Working together secretly with someone, often for a bad purpose.

例句

The police discovered that the mayor was in league with local gangsters.

Are you in league with the other team to cheat in the game?