Where does “venenosus” come from?

venenosus (Latin) comes from Latin venēnum, from Proto-Italic weneznom, from Proto-Indo-European wenh₁- — to love.

Ancestry of “venenosus”, step by step

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

venenosus — Etymology, Origin & Word History | Etymology Explorer