Where does “vigilare” come from?

vigilare (Latin) comes from Latin vigil, from Proto-Indo-European weǵ- — lively, awake; strong.

Ancestry of “vigilare”, step by step

Step	Language	Word	Meaning
1	Latin	vigil	awake, watching, alert; watchman, guard,...
2	Proto-Indo-European	weǵ-	lively, awake; strong

vigilare — Etymology, Origin & Word History | Etymology Explorer