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Jyutping faat3 wai1
Pinyin fā wēi

Definitions (粵典–words.hk)
  1. 動詞
    表現​能力​,​贏取​風頭
    to become powerful or mighty
    • 老虎唔發威你當我病貓吓?
      老虎唔发威你当我病猫吓?
      You won't treat me like a cat when I roar like a tiger.
Definitions (Wiktionary)
  1. verb
    to display one's prowess; to throw one's weight around
Examples (粵典–words.hk)
  1. Cantonese
    老虎唔发威你当我病猫吓?
    老虎唔發威你當我病貓吓?
    • You won't treat me like a cat when I roar like a tiger.