Knuckleheadedness

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The state or condition of being knuckleheaded; foolishness or ineptitude. uncountable

Etymology

From knuckleheaded + -ness.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.