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Jyutping zing3 ngai6
Pinyin zhèng wèi

Definitions (Wiktionary)
  1. verb
    to prove false; to falsify

證偽 [证伪]

Jyutping
Pinyin zhèng wěi

Definitions (CC-CEDICT)
  1. to disprove
  2. to confirm (sth) to be false