Where does “nuthead” come from?

nuthead (English) comes 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.

nuthead (English): A silly or crazy person; kook; A stupid person;...

Definitions

  1. A silly or crazy person; kook; A stupid person;...

Ancestry of “nuthead”, step by step

nuthead traces back through two separate lines of ancestry.

via English head

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

via English Nut

StepLanguageWordMeaning
1EnglishNutThe goddess who serves as the personification of the sky
2Middle Englishnotenote; Alternative form of not
3Old Englishnotuuse; enjoyment; profit, advantage, utility
4Proto-Germanicnutōuse, profit, yield
5Proto-Indo-Europeannewd-to seize; grasp; use; to grasp, seize, use; to...
Every word from Proto-Indo-European -ḱos