pig ‧ head ‧ ed /ˌpɪɡˈhedəd◂, ˌpɪɡˈhedɪd◂/ BrE AmE adjective
determined to do things the way you want and refusing to change your mind, even when there are good reasons to do so SYN stubborn :
Never have I met a woman so obstinate, so pigheaded!
—pigheadedness noun [uncountable] :
It was just sheer pigheadedness on his part.