Boneheadedness

/ˈboʊnhedɪdnəs/ noun

The quality or state of being stupid, stubborn, or lacking intelligence.

From 'boneheaded' (adjective) + '-ness' (abstract noun suffix), creating a noun that describes the quality of stupidity or stubborn behavior.

📖 Full word page — etymology, 47 translations, audio 🔑 Get Free API Key — 50 lookups/day 📚 Read the Docs — integrate Word Orb