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Jyutping mou5 seng1 ceot1
Pinyin mǎo shēng chū

Definitions (粵典–words.hk)
  1. 動詞
    冇​任何​回應​;​通常​指因​為​理虧​或​受​對​方氣勢​阻嚇​而​唔​能夠​作出​反應
    unable to reply; usually due to being in the wrong or being intimidated by another party
    • 我大聲質問佢點解唔事先通知我,佢冇聲出。
      我大声质问佢点解唔事先通知我,佢冇声出。
      ngo5 daai6 seng1 zat1 man6 keoi5 dim2 gaai2 m4 si6 sin1 tung1 zi1 ngo5, keoi5 mou5 seng1 ceot1.
      I questioned him loudly as to why he didn't notify me before taking action. He was silent.
Definitions (Wiktionary)
  1. adj, Cantonese
    cornered and unable to reply further
Examples (粵典–words.hk)
  1. Cantonese
    我大声质问佢点解唔事先通知我,佢冇声出。
    我大聲質問佢點解唔事先通知我,佢冇聲出。
    ngo5 daai6 seng1 zat1 man6 keoi5 dim2 gaai2 m4 si6 sin1 tung1 zi1 ngo5, keoi5 mou5 seng1 ceot1.
    • I questioned him loudly as to why he didn't notify me before taking action. He was silent.