㗂 | shěng | variant of 省[sheng3] / tight-lipped / to examine / to watch / to scour (esp. Cantonese) | |
嘴牢 | zuǐ láo | tight-lipped | |
守口如瓶 | shǒu kǒu rú píng | lit. to guard one's mouth like a closed bottle (idiom) / tight-lipped / reticent / not breathing a word | |
三缄其口 | sān jiān qí kǒu | (idiom) reluctant to speak about it / tight-lipped | |
闭口不谈 | bì kǒu bù tán | to refuse to say anything about (idiom) / to remain tight-lipped / to avoid mentioning |