hardheartedly
hard-heart-ed-ly
adverb
Acting without sympathy or compassion for others' suffering or misfortune.
"He hardheartedly ignored their pleas for assistance."
Thesaurus
Synonyms: unfeeling, stonyhearted, uncompassionate, hardhearted, flint, flinty, granitic, obdurate, heartless, stony
Antonyms: soft-boiled, softhearted