tacit

他们之间有一种默契，不需要言语就能理解对方。

There was a ___tacit understanding between them that didn't require words.

委员会成员一言不发地达成了推迟投票的默契。

The committee members reached a ___tacit agreement to postpone the vote without saying a word.

工作室里有一条心照不宣的规矩：点评期间任何人不得使用手机。

A ___tacit rule at the workshop was that no one used their phone during critiques.