不bat1約joek3而ji4同tung4

English

1. (idiom) (of two or more people) to take the same action without prior consultation; (usu. used adverbially) all (or both) of them, independently; as if by prior agreement
2. acting or thinking in the same way without prior consultation or agreement; of similar thinking

粵語 — Cantonese

1. 咁啱諗埋或者做埋同一樣野

Examples

• 佢哋聽到呢個好消息，不約而同唱起國歌。

  When they heard the good news, they coincidentally both started singing the national anthem.