Where does “exercitus” come from?

exercitus (Latin) comes from Latin exerceo, from Latin arceo, from Proto-Italic arkeō, from Proto-Indo-European h₂erk- — to protect, guard, hold, lock.

exercitus (Latin): occupied, exercised, practised; vexed, harassed;...

Definitions

  1. occupied, exercised, practised; vexed, harassed;...

Ancestry of “exercitus”, step by step

StepLanguageWordMeaning
1LatinexerceoI keep busy, keep at work, drive on; occupy,...
2LatinarceoI shut up, enclose; box in; I keep off, ward off;...
3Proto-Italicarkeōto contain
4Proto-Indo-Europeanh₂erk-to protect, guard, hold, lock

Words derived from “exercitus

Every word from Proto-Indo-European h₂erk-Every word from Proto-Italic arkeōEvery word from Latin arceo