Where does “dunderheaded” come from?

dunderheaded (English) comes from English headed, from English head, from English -y, from Middle English -y, from Old English -iġ, from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

dunderheaded (English): Stupid, foolish

Definitions

  1. Stupid, foolish

Ancestry of “dunderheaded”, step by step

dunderheaded traces back through two separate lines of ancestry.

via English headed

StepLanguageWordMeaning
1EnglishheadedOf a sheet of paper: having the sender's name,...
2EnglishheadThe part of the body of an animal or human which...
3English-yAdded to nouns and adjectives to form adjectives...
4Middle English-yDesignates an adjective, in many cases formed by...
5Old English-iġ-y, -ic
6Proto-West Germanic-gForms adjectives from nouns and verbs with a...
7Proto-Germanic-gaz-y
8Proto-Indo-European-ḱos-y, -ic

via English dunder

StepLanguageWordMeaning
1EnglishdunderThe lees or dregs of cane juice, used in the...
2EnglishunderIn or at a lower level than; As a subject of;...
3Middle Englishunderunder
4Old Englishunderunder, beneath
5Proto-Germanicunderamong, between; under, beneath; under
6Proto-Indo-Europeanh₁entérbetween
7Proto-Indo-Europeanh₁enin; in, inside

Words derived from “dunderheaded

Every word from Proto-Indo-European -ḱosEvery word from English -yEvery word from Old English -iġ