Main Entry: dun·der·head

Pronunciation: \ˈdən-dər-ˌhed\

Function: noun

Etymology: perhaps from Dutch donder thunder + English head; akin to Old High German thonar thunder — more at thunder

Date: circa 1625

: dunce, blockhead

— dun·der·head·ed \ˌdən-dər-ˈhe-dəd\ adjective