The characteristic of being obdurate; stubbornness.(noun)
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Use "obdurateness" in a sentence
"Such obdurateness, truculence and refusal to accept reality is to be applauded."
"Mr. Hard-Heart, thou art here indicted by the name of Hard-Heart (an intruder upon the town of Mansoul), for that thou didst most desperately and wickedly possess the town of Mansoul with impenitency and obdurateness; and didst keep them from remorse and sorrow for their evils, all the time of their apostasy from and rebellion against the blessed King Shaddai."
"Had not God laid obdurateness and stubbornness upon his spirit, we had long since, in all probability, been ruined."