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Jyutping bat1 zung1
Pinyin bù zhōng

Definitions (CC-CANTO)
  1. Disloyalty
Definitions (粵典–words.hk)
  1. 形容詞
    對​伴侶​唔​忠​誠​,​有​外遇​;​同伴​侶​以外​嘅​人​有​親​密​性​接​觸​或​情感​上​嘅​瓜葛
    (to someone's partner) unfaithful, to have an affair
    • 配偶不忠係離婚嘅最大理由。
      配偶不忠系离婚嘅最大理由。
      pui3 ngau5 bat1 zung1 hai6 lei4 fan1 ge3 zeoi3 daai6 lei5 jau4.
      The biggest reason for a divorce is the unfaithfulness of the spouse.
  2. 形容詞
    對國家​唔​忠心​,​有​異心
    disloyal (to the king, country, etc.)
  3. 近義詞
    出軌
Definitions (Wiktionary)
  1. adj
    unfaithful; disloyal
    • 他對他的愛人不忠。
      他对他的爱人不忠。
      tā duì tā de ài rén bù zhōng .
      He cheated on his spouse.
    • 約翰的女友發現了他的不忠並甩了他,原來他也有今天。
      约翰的女友发现了他的不忠并甩了他,原来他也有今天。
      yuē hàn de nǚ yǒu fā xiàn le tā de bù zhōng bìng shuǎi le tā , yuán lái tā yě yǒu jīn tiān .
      After discovering John's infidelity his girlfriend dumped him - in the end he really got his just deserts.
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    翻译就像一个女人。她漂亮就会不忠诚;她忠诚就肯定不会漂亮。
    翻譯就像一個女人。她漂亮就會不忠誠;她忠誠就肯定不會漂亮。
    fān yì jiù xiàng yí gè nǚ rén 。 tā piào liang jiù huì bù zhōng chéng ; tā zhōng chéng jiù kěn dìng bù huì piào liang 。
    • Translation is like a woman. If it is beautiful, it is not faithful. If it is faithful, it is most certainly not beautiful.
Examples (粵典–words.hk)
  1. Cantonese
    配偶不忠系离婚嘅最大理由。
    配偶不忠係離婚嘅最大理由。
    pui3 ngau5 bat1 zung1 hai6 lei4 fan1 ge3 zeoi3 daai6 lei5 jau4.
    • The biggest reason for a divorce is the unfaithfulness of the spouse.
Examples (Wiktionary)
  1. Mandarin
    他对他的爱人不忠。
    他對他的愛人不忠。
    tā duì tā de ài rén bù zhōng .
    • He cheated on his spouse.
  2. Mandarin
    约翰的女友发现了他的不忠并甩了他,原来他也有今天。
    約翰的女友發現了他的不忠並甩了他,原來他也有今天。
    yuē hàn de nǚ yǒu fā xiàn le tā de bù zhōng bìng shuǎi le tā , yuán lái tā yě yǒu jīn tiān .
    • After discovering John's infidelity his girlfriend dumped him - in the end he really got his just deserts.