stiff-necked Synonyms

unmalleable unbending tenacious stubborn steadfast single-minded self-willed rigid resolute relentless refractory recalcitrant uncompromising unrelenting unshakable uncooperative rock-ribbed stubborn as a mule iron-willed strong-willed hardheaded pigheaded bolshie unyielding unaccommodating willful perverse pertinacious firm dogged difficult determined contumacious contrary contrarious bullheaded bloody-minded balky adamantine headstrong immovable implacable persistent persevering opinionated obstinate obdurate mulish intransigent intractable