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Jyutping min6 fei4
Pinyin miàn fěi

Definitions (Wiktionary)
  1. noun
    topdressing
  2. noun
    leaven; leavening dough

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Jyutping min6 fei4
Pinyin miàn féi

Definitions (CC-CEDICT)
  1. leaven
  2. sourdough