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Jyutping beng6 cung4 hau2 jap6
Pinyin bìng cóng kǒu rù

Definitions (CC-CEDICT)
  1. Illness enters by the mouth (idiom). Mind what you eat!
  2. fig. A loose tongue may cause a lot of trouble.
Definitions (粵典–words.hk)
  1. x
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Wiktionary)
  1. Mandarin
    病从口入,祸从口出
    病從口入,禍從口出
    bìng cóng kǒu rù , huò cóng kǒu chū
    • illness comes in via the mouth because of food and trouble goes out via the mouth because of words