Where does “strongheaded” come from?

strongheaded (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.

Ancestry of “strongheaded”, step by step

strongheaded 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 strong

StepLanguageWordMeaning
1EnglishstrongCapable of producing great physical force;...
2Middle Englishstrongstrong; Alternative form of straunge
3Old Englishstrangstrong
4Proto-West Germanicstrangsevere, strict, rigorous; strong
5Proto-Germanicstrangaztight, strict, straight; strong
6Proto-Indo-Europeanstrengʰ-to twist; rope, cord
7Proto-Indo-Europeanster-sterile, infertile

Words derived from “strongheaded

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