Answer: cruelly

AnswerCrossword Clue
CRUELLYAs a sadist would
CRUELLYHow villains act
CRUELLYHow Simon Cowell often critiques
CRUELLYIn a merciless fashion
CRUELLYWith malice
cruellyCRUEL, disposed to inflict pain
cruellywillfully causing pain