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Jyutping zaai1 gaai3 muk6 juk6
Pinyin zhāi jiè mù yù

Definitions (Wiktionary)
  1. phrase, idiomatic
    to fast (by abstaining from meat, wine, etc.) and bathe oneself and change into clean clothes before a ritual or ceremony
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    斋戒沐浴
    齋戒沐浴
    zaai1 gaai1 muk6 juk6
    • to keep a vegetarian diet and bath (for a religious purpose)