pigheadedness
US /ˈpɪɡˌhed.ɪd.nəs/
UK /ˈpɪɡˌhed.ɪd.nəs/
1.
stubbornness or obstinacy, especially in a foolish or unreasonable way
:
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His pigheadedness prevented him from admitting his mistake.
•
We couldn't make any progress due to her sheer pigheadedness.