Where does “ver” come from?

ver (Old French) comes from Latin Verres, from Proto-Italic wersēn, from Proto-Indo-European wérsēn, from Proto-Indo-European h₂wers- — to rain, drip; to rain, sprinkle.

Ancestry of “ver”, step by step

Step	Language	Word	Meaning
1	Latin	Verres	boar, male swine
2	Proto-Italic	wersēn	—
3	Proto-Indo-European	wérsēn	virile man; male animal
4	Proto-Indo-European	h₂wers-	to rain, drip; to rain, sprinkle

Words derived from “ver”

verrat
véthot

Every word from Proto-Indo-European h₂wers- →Every word from Proto-Indo-European wérsēn →Every word from Proto-Italic wersēn →