1. (a.) Hardened in feelings; unyielding; hard-hearted; stubbornly wicked\.

2. (a.) Hard; harsh; rugged; rough; intractable.

3. (v. t.) To harden.

adamant asleep benumbed bony brazen callous calloused case-hardened cement cemental cold cold of heart coldblooded coldhearted concrete conscienceless corneous dead deadened dense diamondlike dogged dour dull dure firm flinthearted flintlike flinty fundamentalist granitelike granitic hard hard as nails hard of heart hard-bitten hard-boiled hard-nosed hard-set hardened hardhearted heartless hidebound horny immovable impassible impenitent imperceptive impercipient impliable indurated inexorable inflexible insensate insensible insensitive insentient insolent inured iron iron-hard ironbound ironclad ironhanded ironlike lapideous lithoid lithoidal lost to shame marble marblelike mulish muscle-bound numb numbed obstinate obtuse orthodox osseous procrustean purist puristic puritan puritanic relentless resistant resistive rigid rigorist rigoristic rigorous rockbound rocklike rocky seared shameless solid steellike steely stiff stiff-necked stonelike stony stonyhearted straightlaced straitlaced stubborn thick-skinned thick-witted tough unabject unbending unblushing uncompassionate uncompromising uncontrite unemotional unfeeling unfelt unmelted unmerciful unnatural unperceptive unrelenting unrepentant unrepenting unresponsive unsoftened unsympathetic untouched unyielding