spare someone's blushes
US /sper ˈsʌm.wʌnz ˈblʌʃ.ɪz/
UK /sper ˈsʌm.wʌnz ˈblʌʃ.ɪz/

1.
免除某人的難堪, 不讓某人臉紅
to avoid embarrassing someone or making them feel ashamed
:
•
I decided not to mention his mistake, to spare his blushes.
我決定不提他的錯誤,以免他難堪。
•
The teacher changed the subject to spare the student's blushes after he gave a wrong answer.
學生答錯後,老師換了個話題,以免學生難堪。