/ ˈɒbdjərət; NAmE ˈɑːbdər-/ adjective
( formal , usually disapproving ) refusing to change your mind or your actions in any way
SYN stubborn
► ob·dur·acy / ˈɒbdjərəsi; NAmE ˈɑːbdər-/ noun [ U ]
► ob·dur·ate·ly adverb
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WORD ORIGIN
late Middle English (originally in the sense hardened in sin, unrepentant ): from Latin obduratus , past participle of obdurare , from ob- in opposition + durare harden (from durus hard).