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obdurate

[ob-doo-rit, -dyoo-] /ˈɒb dʊ rɪt, -dyʊ-/
adjective
1.
unmoved by persuasion, pity, or tender feelings; stubborn; unyielding.
2.
stubbornly resistant to moral influence; persistently impenitent:
an obdurate sinner.
Origin
late Middle English
1400-1450
1400-50; late Middle English obdurat < Latin obdūrātus (past participle of obdūrāre to harden), equivalent to ob- ob- + dūr(us) hard + -ātus -ate1
Related forms
obdurately, adverb
obdurateness, noun
unobdurate, adjective
unobdurately, adverb
unobdurateness, noun
Synonyms
1. hard, obstinate, callous, unbending, inflexible. 2. unregenerate, reprobate, shameless.
Antonyms
1. soft, tractable. 2. humble, repentant.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for obdurateness

obdurate

/ˈɒbdjʊrɪt/
adjective
1.
not easily moved by feelings or supplication; hardhearted
2.
impervious to persuasion, esp to moral persuasion
Derived Forms
obduracy, obdurateness, noun
obdurately, adverb
Word Origin
C15: from Latin obdūrāre to make hard, from ob- (intensive) + dūrus hard; compare endure
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for obdurateness

obdurate

adj.

mid-15c., "stubborn; hardened," from Latin obduratus "hardened," past participle of obdurare "be hard, hold out, persist, endure," from ob "against" (see ob-) + durare "harden, render hard," from durus "hard" (see endure). Related: Obdurately.

Online Etymology Dictionary, © 2010 Douglas Harper
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