Where does “viglare” come from?

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

Ancestry of “viglare”, step by step

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

viglare — Etymology, Origin & Word History | Etymology Explorer