除惡務盡 [－恶务尽]

Jyutping ceoi4 ok3 mou6 zeon6
Pinyin chú è wù jìn

Definitions (CC-CEDICT)
  1. to eradicate evil completely (idiom); thorough in rooting out wickedness
Definitions (粵典–words.hk)
  1. 動詞
    消滅​奸惡時​要務求​徹底
    to remove the evil things completely