Where does “fitnesswear” come from?

fitnesswear (English) comes from English fitness, from English fit, from English outfit, from English out, from Middle English oute, from Old English ūt, from Proto-West Germanic *ūt, from Proto-Germanic ūt — out, outward.

Ancestry of “fitnesswear”, step by step

fitnesswear traces back through two separate lines of ancestry.

via English fitness

StepLanguageWordMeaning
1EnglishfitnessThe condition of being fit, suitable or...
2EnglishfitSuitable, proper; Adapted to a purpose or...
3EnglishoutfitA set of clothing; Gear consisting of a set of...
4EnglishoutAway from the inside, centre or other point of...
5Middle Englishouteout
6Old Englishūtout
7Proto-West Germanic*ūtout, outward
8Proto-Germanicūtout, outward
9Proto-Indo-Europeanúdout, outward

via English Wear

StepLanguageWordMeaning
1EnglishWearThe cities of Durham and Sunderland are situated upon its grand banks
2Middle EnglishwerenPlural past indicative form of been; Plural...
3Old Englishwerianto wear; to defend, protect
4Proto-West Germanicwaʀjanto clothe
5Proto-Germanicwarjanąto ward off, to defend against; to thwart, to...
6Proto-Indo-Europeanwēr-true
7Proto-Indo-Europeanwer-to burn; to cover, heed, notice; squirrel
Every word from Proto-Indo-European úd
fitnesswear — Etymology, Origin & Word History | Etymology Explorer