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Jyutping mou4 jyun4 mou4 gu3
Pinyin wú yuán wú gù

Definitions (CC-CEDICT)
  1. no cause, no reason (idiom); completely uncalled for
Definitions (粵典–words.hk)
  1. 語句
    冇​啦​啦​;​冇​任何​原因​或​理由
    without any reason
    • 佢無緣無故就消失咗。
      佢无缘无故就消失咗。
      keoi5 mou4 jyun4 mou4 gu3 zau6 siu1 sat1 zo2.
      He suddenly disappeared.
Definitions (Wiktionary)
  1. adv
    without cause or reason; for no reason at all
    (syn.) 无因致端, 無啦啦, 无事无白, 無因端, 無事無白, 无代无志, 无底无代, 無因致端, 無情冇事, 无情冇事, 无因端, 無底無代, 無代無誌, 无啦啦
    • 世上決沒有無緣無故的愛,也沒有無緣無故的恨。
      世上决没有无缘无故的爱,也没有无缘无故的恨。
      shì shàng jué méi yǒu wú yuán wú gù de ài , yě méi yǒu wú yuán wú gù de hèn .
      There is absolutely no such thing in the world as love or hatred with out reason or cause.
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    无缘无故
    無緣無故
    mou4 jyu4 mou4 gu3
    • without any (proper) reason
  2. Cantonese
    佢无缘无故就消失咗。
    佢無緣無故就消失咗。
    keoi5 mou4 jyun4 mou4 gu3 zau6 siu1 sat1 zo2.
    • He suddenly disappeared.
Examples (Wiktionary)
  1. Mandarin
    世上决没有无缘无故的爱,也没有无缘无故的恨。
    世上決沒有無緣無故的愛,也沒有無緣無故的恨。
    shì shàng jué méi yǒu wú yuán wú gù de ài , yě méi yǒu wú yuán wú gù de hèn .
    • There is absolutely no such thing in the world as love or hatred with out reason or cause.
    • There is absolutely no such thing in the world as love or hatred without reason or cause.
  2. Mandarin
    无缘无故的,你着什么急?
    無緣無故的,你着什麼急?
    wú yuán wú gù de , nǐ zháo shén me jí ?
    • Why do you get excited for no reason at all?