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Jyutping bat1 ji1 bat1 jiu4
Pinyin bù yī bù ráo

Definitions (CC-CEDICT)
  1. not to overlook, nor spare (idiom); unwilling to forgive
  2. to treat severely without listening to excuses
Definitions (Wiktionary)
  1. phrase, idiomatic
    unforgiving; unwilling to pardon
  2. phrase, idiomatic
    to not stop pestering (in order to achieve one's goal)