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

Hard as steel, steely.

Not easily moved or affected emotionally; resistant to pity or entreaty; unfeeling, callous. Also in hard of heart. Cf. hard-hearted, adj.

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

figurative. ‘Hard’, insensible, or unfeeling, as if consisting of stone; hardened, obdurate.

hardened.

Hard. literal and figurative.

Of persons, their character, feelings, etc.: Morally hardened, rendered callous; also, fixed in determination, stubborn, obstinate. Now rare.

Resembling, or having the character of, stone; stony. (Chiefly figurative.)

Made unfeeling, callous, or cynical, (now) esp. by experience; hard-hearted; hard-bitten.

Of a person, his qualities, etc.. Hard and cold as steel, unimpressionable, inflexible, obdurate.

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

Hardened, callous; = indurated, adj.

hard-hearted.

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

hardened, indurate.

hard-hearted.

Of a person, or his or her qualities, behaviour, etc. Cf. steely, adj. 4a. Unimpressionable, unfeeling; stony. Now rare.

figurative. Chiefly poetic. White, hard, cold, or unyielding like marble. Frequently in parasynthetic adjectives, as marble-breasted, marble-hearted…

= stony-hearted, adj.

Having a stony heart; cruel, unfeeling, merciless.

Extremely hard-hearted; unfeeling, pitiless; cruel.

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

figurative. Of a person's disposition or character: difficult to affect or elicit sympathy from; unfeeling, unyielding; flinty, hard. Chiefly in r…

Covered with thickened skin; hardened, callous: chiefly figurative. Obsolete (at least in figurative sense.)

Hard, cruel, unfeeling.

Trodden down, hardened by repeated treading.

= obdurate, adj. 1.

figurative. Callous, hardened, unfeeling. Obsolete.

= flinty, adj.

= flint-hearted adj.

Of a person, his attributes, etc.: Hardened like steel, insensible to impression, inflexible.

Burnt by cautery; seared.

Of the heart, feelings, etc.: Rendered callous or stubborn.

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

Made of brass; resembling brass in colour, sound, etc. Cf. aeneous, adj.

That feels sorrow no more; feeling no compunction; insensible, callous.

Chiefly parasynthetic, as brawny-chined, brawny-fisted, brawny-hearted, brawny-limbed, etc.

having a hard grain (in various senses); (figurative) tough, gritty; unemotional.

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

Inactive, indifferent, callous.

Cauterized. Also figurative, of the conscience, heart, etc., rendered incapable of feeling.

figurative. Hardened, immobilized, paralysed, (now) esp. rigid with fear, terrified (of).

Of a person, the heart, etc.: made hard, unfeeling, or callous.

Without a core; hollow; heartless.

hard-hearted, stony-hearted.

figurative. Hardened, insensitive, callous; not easily moved.

Having pluck or courage; esp. in (good,etc.) plucked one (also 'un). Conversely †bad-plucked one.

(a) a trap with jaws and spring of steel; (b) figurative (chiefly in attributive use) and in U.S. phrase smart as a steel trap and variants.