駁倒 [驳－]

Jyutping bok3 dou2
Pinyin bó dǎo

Definitions (CC-CEDICT)
  1. to refute
  2. to demolish (an argument, theory etc)
Definitions (Wiktionary)
  1. verb, intransitive, verb-object
    to defeat in a debate; to outargue; to demolish an argument