Save (someone's) breath

Перевод слова "save (someone's) breath" на Русский язык

поберечь (чей-то) язык

He decided to save his breath and not argue with his boss.

Он решил поберечь язык и не спорить с начальником.

To avoid wasting time or effort by not saying something, especially because it will not be listened to or will have no effect.