stub·born 
/ˈstʌbɚn/ adjective
/ˈstʌbɚn/ adjective [more stubborn; most stubborn] 1 : refusing to change your ideas or to stop doing something
▪ She's wrong, but she's too stubborn to admit it. ▪ I admire his stubborn refusal to quit. ▪ She has a stubborn streak. [=she is often stubborn] ▪ He's (as) stubborn as a mule. [=he's very/extremely stubborn] 2 : difficult to deal with, remove, etc.
▪ stubborn hair ▪ trying to treat a stubborn infection ▪ a stubborn stain
▪ She's wrong, but she's too stubborn to admit it. ▪ I admire his stubborn refusal to quit. ▪ She has a stubborn streak. [=she is often stubborn] ▪ He's (as) stubborn as a mule. [=he's very/extremely stubborn]
▪ stubborn hair ▪ trying to treat a stubborn infection ▪ a stubborn stain
— stub·born·ly adverb
▪ She stubbornly refused to move. ▪ The fever persisted stubbornly.
▪ She stubbornly refused to move. ▪ The fever persisted stubbornly.
— stub·born·ness /ˈstʌbɚnnəs/ noun [noncount]
/ˈstʌbɚnnəs/ noun [noncount]
