obdurate Synonyms

obstinate unrepentant hardened unyielding intractable hard inflexible flinty callous firm cussed unbending stubborn stony strong-minded unfeeling unmerciful unregenerate rigorist unregenerated unrelenting unshakable rigid unsparing unswayable self-willed uncompromising set tenacious thick-skinned stiff-necked tough stiff steely toughened steadfast unblushing single-minded wayward wilful unforgiving strong-willed unremorseful rocklike rock-ribbed unsentimental unstirred stonyhearted unchallengeable unbendable