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Jyutping mou4 ji6
Pinyin wú yì

Definitions (CC-CEDICT)
  1. without meaning
  2. nonsense
  3. immoral
  4. faithless
Definitions (Wiktionary)
  1. verb, of a character or word
    to lack meaning; to be meaningless
  2. verb, of DNA mutations
    nonsense
  3. verb, literary
    to lack morals; to lack a sense of justice or fairness