守口如瓶 (shǒu kǒu rú píng) | Meaning: lit. to guard one's mouth like a closed bottle (idiom); tight-lipped | Chinese Idiom with Pinyin & Origin

(idiom) to steadfastly refuse to discuss the matter; to treat it as an untouchable subject讳莫如深huì mò rú shēn

to withhold information · to keep sth secret秘而不宣mì ér bù xuān

to keep sth confidential · to maintain secrecy保密bǎo mì

(idiom) reluctant to speak about it · tight-lipped三缄其口sān jiān qí kǒu

to keep quiet out of fear (idiom)噤若寒蝉jìn ruò hán chán

lit. to guard one's mouth like a closed bottle (idiom); tight-lipped · reticent · not breathing a word