Antonyms of obdurate :
regenerate, soft-boiled, softhearted, amenable, dutiful, pliable, tractable, complaisant, gentle, pliant, undecided, compliant, irresolute, submissive, wavering, docile, obedient, teachable, yielding, benevolent, benignant, kind, clement, indulgent, lenient, mild, cordial, friendly, good-natured, good-tempered, gracious, tolerant, understanding, affectionate, fond, loving, charitable, compassionate, humane, kindhearted, kindly, merciful, sensitive, sympathetic, tender, tenderhearted, warm, warmhearted, placable, accepting, persuadable, receptive, responsive, willing, governable, manageable, reasonable, temperate, slavish, subservient, acquiescent, agreeable, complying, flexible, relenting.
Examples of usage:
McCalloway came forward then, and while he talked, Boone listened with attentive patience, but an obdurate face. "The Tempering", Charles Neville Buck.
But the Father was obdurate, for he thought his Bishop might not approve. "The New North", Agnes Deans Cameron.
Yet he was obdurate. "The Master Mystery", Arthur B. Reeve and John W. Grey.