Where does “venino” come from?

venino (Old Spanish) comes from Latin venīnum, from Latin venēnum, from Proto-Italic weneznom, from Proto-Indo-European wenh₁- — to love.

Ancestry of “venino”, step by step

Step	Language	Word	Meaning
1	Latin	venīnum	—
2	Latin	venēnum	—
3	Proto-Italic	weneznom	lust, desire
4	Proto-Indo-European	wenh₁-	to love

venino — Etymology, Origin & Word History | Etymology Explorer