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1. Not changing in response to argument or other influence; obstinate or intractable: "Everyone in the region has been obdurate in water negotiations with everyone else" (Marq de Villiers).
a. Hardened in wrongdoing or wickedness; stubbornly impenitent: "obdurate conscience of the old sinner" (Sir Walter Scott).
b. Hardened against feeling; hardhearted: an obdurate miser.
[Middle English obdurat, from Late Latin obdūrātus, past participle of obdūrāre, to harden, from Latin, to be hard, endure : ob-, intensive pref.; see ob- + dūrus, hard; see deru- in Indo-European roots.]
ob′du·ra·cy (-do͝or-ə-sē, -dyo͝or-), ob′du·rate·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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The quality or state of being stubbornly inflexible:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.