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Jyutping bai3 hau2
Pinyin bì kǒu

Definitions (Wiktionary)
  1. verb, literary
    to close one's mouth
  2. verb, literary
    to remain tight-lipped; to keep mum
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Wiktionary)
  1. Mandarin
    不要开口闭口说分手。
    不要開口閉口説分手。
    bù yào kāi kǒu bì kǒu shuō fēn shǒu .
    • Don't talk about breaking up all the time.
  2. Mandarin
    我和高龄的父亲同住,他开口闭口都是些难听的话,言论偏激、批判恶毒,对过去永远抱怨不休。
    我和高齡的父親同住,他開口閉口都是些難聽的話,言論偏激、批判惡毒,對過去永遠抱怨不休。
    wǒ hé gāo líng de fù qīn tóng zhù , tā kāi kǒu bì kǒu dōu shì xiē nán tīng de huà , yán lùn piān jī , pī pàn è dú , duì guò qù yǒng yuǎn bào yuàn bù xiū .
    • I live together with my elder father. He always says nasty things, radical remarks, vicious comments and endless complaints about the past.