save (someone's) breath

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

noun
дыхание
save

verb
сохранить