1. (a.) Without a heart.

2. (a.) Destitute of courage; spiritless; despondent.

3. (a.) Destitute of feeling or affection; unsympathetic; cruel.

Laodicean Olympian affectless aloof anesthetized apathetic arctic autistic benumbed blah blase blunt bowed-down bowelless brazen brutal callous calloused case-hardened cast down catatonic chill chilly cold cold as charity cold of heart cold-blooded coldblooded coldhearted comatose conscienceless cool cruel dashed dejected depressed desensitized despairing despondent desponding detached discouraged disheartened disinterested dispassionate dispirited dog-eat-dog down downcast downhearted drooping droopy drugged dull emotionally dead emotionless feeling low flinthearted flinty frigid frosted frosty frozen gritless gutless hard hard of heart hard-boiled hardened hardhearted harsh hebetudinous hopeless hypochondriac hypochondriacal icy immovable impassible impassive in a stupor in low spirits in the depths in the doldrums in the dumps inclement indifferent indurated inexcitable inexorable inhuman inhumane insensitive insouciant insusceptible inured languid languishing lethargic listless lost to shame low low-spirited merciless nonchalant nonemotional numb numbed obdurate objective obtuse out of touch passionless passive pessimistic phlegmatic pining pitiless pluckless relentless remorseless resigned ruthless seared self-absorbed shameless slack sluggish soporific soulless spiritless spunkless stoic stonyhearted stupefied subdued suicidal supine torpid unaffectionate unblushing uncaring uncompassionate uncompassioned unconcerned uncourageous undaring unemotional unfeeling unforgiving ungallant unheroic unimpassioned unimpressionable uninterested unintrepid unkind unloving unmerciful unnatural unpassionate unpitiful unpitying unremorseful unresponding unresponsive unsoldierlike unsoldierly unsusceptible unsympathetic unsympathizing untouchable unvaliant unvalorous unyielding weary of life withdrawn without mercy woebegone world-weary