守口如瓶 [ㄕㄡˇ ㄎㄡˇ ㄖㄨˊ ㄆㄧㄥˊ; shou3 kou3 ru2 ping2] lit. to guard one's mouth like a closed bottle (idiom); tight-lipped reticent not breathing a word ◄ ►
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