| 单词 | keep one's mouth shut | 
| 释义 | keep one's mouth shutidiom1   : to not say anything  When he starts talking about politics, I just keep my mouth shut. 2   : to not talk about something (such as a secret)  She told me to keep my mouth shut about the news. I never tell him anything important because he doesn't know how to keep his mouth shut. | 
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