Where does “exercisewear” come from?

exercisewear (English) comes from English exercise, from Middle English exercise, from Old French exercise, from Latin exercitium, from Latin exerceo, from Latin arceo, from Proto-Italic arkeō, from Proto-Indo-European h₂erk- — to protect, guard, hold, lock.

Ancestry of “exercisewear”, step by step

exercisewear traces back through two separate lines of ancestry.

via English exercise

StepLanguageWordMeaning
1EnglishexerciseAny activity designed to develop or hone a skill...
2Middle Englishexercise
3Old Frenchexercise
4Latinexercitiumexercise, practice
5LatinexerceoI keep busy, keep at work, drive on; occupy,...
6LatinarceoI shut up, enclose; box in; I keep off, ward off;...
7Proto-Italicarkeōto contain
8Proto-Indo-Europeanh₂erk-to protect, guard, hold, lock

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 h₂erk-
exercisewear — Etymology, Origin & Word History | Etymology Explorer