Where does “valliare” come from?

valliare (Vulgar Latin) comes from Latin vallus, from Latin vallum, from Proto-Indo-European wēl-.

Ancestry of “valliare”, step by step

Step	Language	Word	Meaning
1	Latin	vallus	palisade; stake, pole
2	Latin	vallum	wall, rampart, entrenchment
3	Proto-Indo-European	wēl-	—

valliare — Etymology, Origin & Word History | Etymology Explorer