keepverb(STAY)

keep (something) quiet

phrase
C2
to try to stop other people from finding out about a fact: （对…）守口如瓶；（对…）保密
keep quiet aboutDavies kept quiet about the amount of money being spent.戴维斯对所花的钱款数额守口如瓶。
She managed to keep the operation quiet for a while.她设法使得该行动在一段时间内保密。
We were told to keep it quiet and not talk about it.
Everyone around her was aware of her fragile mental health but they kept it quiet.
They tried to keep quiet for as long as they could, but in the end the information was leaked.
See also