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hardheartedly

ADVERB

brutally

Synonyms

STRONGEST

ferociously fiercely mercilessly relentlessly ruthlessly savagely viciously

WEAK

atrociously barbarically barbarously brutishly callously demoniacally diabolically ferally heartlessly in cold blood inexorably inhumanely inhumanly meanly murderously pitilessly remorselessly something fierce something terrible unkindly unrelentingly

Antonyms

WEAK

gently humanely kindly nicely