# knuckleheaded

> English word · Adjective

## Definitions
1. Stupid or inept, like a knucklehead.

## Etymology
From knuckle + headed.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/knuckleheaded