Where does “exerciseth” come from?

exerciseth (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.

exerciseth (English): third-person singular simple present indicative...

Definitions

  1. third-person singular simple present indicative...

Ancestry of “exerciseth”, step by step

exerciseth 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 eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Proto-Indo-European h₂erk-
exerciseth — Etymology, Origin & Word History | Etymology Explorer