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Jyutping mui6 zyu1
Pinyin mèi zhū

Definitions (Wiktionary)
  1. noun, Cantonese, endearing
    girl; lovely girl

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Jyutping mui1 zyu1
Pinyin mèi zhū

Definitions (粵典–words.hk)
  1. 名詞
    對​年紀​比​較​細​嘅​女性​比​較親​暱​嘅​叫法
    lovely girl