Definition of obdurate
1a
: stubbornly persistent in wrongdoing
an unrepentant, obdurate sinner
b
: hardened in feelings
The obdurate enemy was merciless.
2
: resistant to persuasion or softening influences
obdurate in his determination remaining obdurate to her husband's advances— Edith Wharton
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Merriam-Webster unabridged
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Time Traveler for obdurate
The first known use of obdurate was in the 15th century
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