stubborn

Synonyms: adamant balky bullheaded cantankerous contumacious cussed determined dogged firm fixed hardheaded headstrong inexorable inflexible insubordinate intractable mulish obdurate opinionated ornery persevering persistent pertinacious perverse pigheaded rebellious recalcitrant refractory relentless rigid selfwilled set in one’s ways single-minded steadfast stiff-necked tenacious tough unbending unmanageable unreasonable unshakable untoward willful

Antonyms: broad-minded complacent compliant giving willing yielding