Not susceptible to persuasion or to strong (esp. benevolent) emotions; unfeeling; obdurate; = hard-hearted, adj. Obsolete (archaic and rare in later…

(a) Odious, detestable. (b) Full of hatred; malevolent, malicious; hostile. (c) Cruel; fierce; deadly.

Not susceptible to persuasion or to strong (esp. benevolent) emotions; unfeeling; obdurate. Also figurative. Also as n. with the and plural…

Of persons (also transferred and figurative of things): Disposed to inflict suffering; indifferent to or taking pleasure in another's pain or…

Hard. literal and figurative.

figurative. Of a person or his heart: Obdurate, unfeeling, hard-hearted. Cf. stony, adj. 5.

Devoid of feeling; displaying a complete lack of compassion or consideration; callous, unkind, cruel. Also occasionally: without genuine feeling…

hard-hearted.

= stony-hearted, adj.

Having a stony heart; cruel, unfeeling, merciless.

Extremely hard-hearted; unfeeling, pitiless; cruel.

Hard-hearted; cruel, unfeeling; obdurate, inflexible.

Having no bowels; figurative unaffectionate, pitiless.

Rough, harsh; unfeeling, unsparing. Obsolete.

= flinty, adj.

= flint-hearted adj.

figurative with many varieties of sense. Hard as brass, pitiless, unfeeling.

Devoid of kindly or tender feelings; uncompassionate, unsympathetic.

Having the blood (physically) cold, or of a temperature not higher than the external air or water: said esp. of fishes and reptiles as distinguished…

Wanting in sensibility, cordiality, or natural affection; unfeeling; unkind.

(a) of a person: hard-hearted; (b) having a hard or flint-like core.

figurative. Not easily moved or affected emotionally; hard, unfeeling; (in later use) esp. showing a disregard for the feelings or welfare of…

(un-, prefix1 affix 4.)

= cold-hearted, adj.

hard-hearted, stony-hearted.

(un-, prefix1 affix 1; cf. sympathetic, adj. 2b.)

Feelingless, cold-blooded; void of emotion.