adjective
1.
Synonyms: insensate 1, inanimate, insensible, insentient, senseless
Antonyms: feeling
2.
lacking in normal human sympathy
an unfeeling response to a plea for help
Synonyms: callous, cold-blooded, coldhearted, compassionless, hard-boiled, hardened, hardhearted, heartless, ironhearted, marblehearted, obdurate, stony, stonyhearted, uncompassionate, unemotional, unsympathetic; compare pitiless
Related Word: brutal, cruel, indurated, merciless, roughhearted, ruthless, tough; exacting, severe; unamiable, uncordial, unkind; cantankerous, churlish, crotchety, curmudgeonly, surly
Idioms: hard of heart
Contrasted words: considerate, gentle, thoughtful; kind, merciful; compassionate, sympathetic, warmhearted
Antonyms: feeling
3.
Synonyms: numb 1, anesthetized, asleep, benumbed, dead, deadened, insensible, insensitive, numbed, senseless