pinheadedness

/ˈpɪnˌhɛdɪdnəs/
noun
  1. The quality or state of being stupid or narrow-minded.
    • We need to overcome the pinheadedness that keeps us from trying new ideas.
    • His pinheadedness made it impossible to have a reasonable discussion.
    • The project failed because of the manager's sheer pinheadedness.
Antonyms