obdurate
(ŏb′do͝o-rĭt, -dyo͝o-)
adj.
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).
2.
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.
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