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Jyutping hau2 jing4
Pinyin kǒu xíng

Definitions (Wiktionary)
  1. noun
    embouchure
  2. noun
    shape of the mouth (when speaking or singing)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    哗,佢哋咪嘴都唔对口型嘅。
    嘩,佢哋咪嘴都唔對口型嘅。
    waa3, keoi5 dei6 mai1 zeoi2 dou1 m4 deoi3 hau2 jing4 ge3.
    • Wow - they can't even lip-sync properly.
  2. Cantonese
    你发音嘅时候要注意口型。
    你發音嘅時候要注意口型。
    nei5 faat3 jam1 ge3 si4 hau6 jiu3 zyu3 ji3 hau2 jing4.
    • You need to be aware of your mouth shape during pronunciation.