obstinate
v.v. unwilling to change your mind or give in, even when you are wrong. You use this to describe someone who is very stubborn and refuses to listen to others.
v. unwilling to comply with a request or to change one's opinion or course of action. Often carries a slightly negative or critical tone when describing a person's character.
He was too obstinate to admit that he was wrong.
The obstinate manager refused to sign the new safety protocol, despite the clear evidence of its necessity.
While his initial resistance was understandable, his obstinate refusal to consider alternative viewpoints eventually alienated his closest colleagues and stalled the entire project.
Inherited from Middle English obstinat(e) (“obstinate, stubborn”), from Latin obstinātus, perfect passive participle of obstinō (“set one's mind firmly upon, resolve”) (see -ate (adjective-forming suffix)), from ob (“before”) + *stinare, from stare (“to stand”). Doublet of ostinato.