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Jyutping faai3 coi3
Pinyin kuài cài

Definitions (Wiktionary)
  1. noun, Cantonese, Hakka, dated, dialectal, euphemistic, in Gan
    Chinese leek; Chinese chives (Allium tuberosum)
    (syn.) 快菜, 扁菜, 韭, 韭菜仔, 快菜 dated, 韭仔, 快菜 sailors, 韭菜