Where does “vigiar” come from?

vigiar (Old Portuguese) comes from Latin vigilāre, from Latin vigil, from Proto-Indo-European weǵ- — lively, awake; strong.

Ancestry of “vigiar”, step by step

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

vigiar — Etymology, Origin & Word History | Etymology Explorer