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

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

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

= obdurate, adj. 1.

hardened, indurate.

Hardened against persuasion, entreaty, the feeling of pity, etc.; obstinate, unyielding, relentless, hard-hearted.

confirmed in evil, hardened, unregenerate; stubborn, obdurate.

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

Characterized by or showing obduracy; obdurate.

Of a person, the conscience, etc.: that has become callous, inured, or indifferent; (of an action or attitude) characteristic of such a person…