Obdurate

a.	1.	Hardened in feelings, esp. against moral or mollifying influences; unyielding; hard-hearted; stubbornly wicked. The very custom of evil makes the heart obdurate against whatsoever instructions to the contrary. - Hooker. Art thou obdurate, flinty, hard as steel, Nay, more than flint, for stone at rain relenteth? - Shak.
	2.	Hard; harsh; rugged; rough; intractable. There is no flesh in man's obdurate heart. - Cowper.
v. t.	1.	To harden.

Adj.	1.	obdurate - stubbornly persistent in wrongdoing Synonyms: cussed, obstinate, unrepentant
	2.	obdurate - showing unfeeling resistance to tender feelings; "the child's misery would move even the most obdurate heart" Synonyms: flinty, stony

adamant, asleep, benumbed, bony, brazen, 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 as nails, hard of heart, hard-bitten, hard-boiled, hard-nosed, hard-set, hardened, hardhearted, heartless, hidebound, horny, immovable, impassible, imperceptive, impercipient, impliable, indurated, inexorable, inflexible, insensate, 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, unabject, unbending, unblushing, uncompassionate, uncompromising, uncontrite, unemotional, unfelt, unmelted, unmerciful, unnatural, unperceptive, unrelenting, unrepentant, unrepenting, unresponsive, unsoftened, unsympathetic, untouched, unyielding