keep your own counsel
US /kiːp jʊər oʊn ˈkaʊn.səl/
UK /kiːp jʊər oʊn ˈkaʊn.səl/

1.
保守自己的意見, 守口如瓶
to keep one's thoughts, plans, or intentions private; to not share one's opinions or decisions with others
:
•
It's often wise to keep your own counsel in sensitive negotiations.
在敏感的談判中,通常明智的做法是保守自己的意見。
•
She decided to keep her own counsel about her future plans.
她決定對自己的未來計劃保守秘密。