heartlessly Synonyms

vengefully numbly obdurately unmercifully remorselessly pitilessly mercilessly unfeelingly callously viciously gloatingly barbarically unsympathetically unsparingly unrepentantly unforgivingly unemotionally unconcernedly spitefully ruthlessly oppressively brutishly murderously unkindly implacably harshly frigidly egotistically disinterestedly cruelly coldly brutely barbarously inclemently inconsiderately unchristianly stonily soullessly selfishly savagely sanguinarily inhumanly inexorably indifferently apathetically