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Jyutping ngoi6 mou2 naa2
Pinyin wài mǔ nǎ

Definitions (粵典–words.hk)
  1. 名詞
    對外​母​嘅​戲​稱
    to call jokingly of the wife's mother. Literally: external mother female
    • 星期日中午要陪外母乸飲茶,唔得閒呀。
      星期日中午要陪外母乸饮茶,唔得闲呀。
      This sunday noon I need to tea with my wife's mother, I'm not free at that time.
Definitions (Kaifangcidian)
  1. 丈母娘

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Jyutping ngoi6 mou5 naa2
Pinyin wài mǔ ná

Definitions (CC-CANTO)
  1. mother-in-law, wife's mother
Examples (粵典–words.hk)
  1. Cantonese
    星期日中午要陪外母乸饮茶,唔得闲呀。
    星期日中午要陪外母乸飲茶,唔得閒呀。
    • This sunday noon I need to tea with my wife's mother, I'm not free at that time.