Where does “coneheaded” come from?

coneheaded (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.

coneheaded (English): Having a cone-shaped head

Definitions

  1. Having a cone-shaped head

Ancestry of “coneheaded”, step by step

coneheaded 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 Cone

StepLanguageWordMeaning
1EnglishConeA surface of revolution formed by rotating a segment of a line around another line that intersects the first line
2Middle Englishcone
Every word from Proto-Indo-European -ḱosEvery word from English -yEvery word from Old English -iġ