adj. 25B6; adjective
you're too stubborn to admit it : OBSTINATE, stubborn as a mule, headstrong, wilful, strong-willed, pig-headed, obdurate, difficult, contrary, perverse, recalcitrant, inflexible, iron-willed, uncompromising, unbending; informal stiff-necked; Brit. informal bolshie, bloody-minded; N. Amer. informal balky; formal pertinacious, refractory; archaic contumacious, froward.
stubborn stains : INDELIBLE, permanent, persistent, tenacious, resistant.
compliant.