Where does “venialis” come from?

venialis (Latin) comes from Latin venia, from Proto-Indo-European wn̥h₁yeh₂, from Proto-Indo-European wenh₁- — to love.

Ancestry of “venialis”, step by step

Step	Language	Word	Meaning
1	Latin	venia	indulgence, kindness; mercy, grace, favour;...
2	Proto-Indo-European	wn̥h₁yeh₂	—
3	Proto-Indo-European	wenh₁-	to love

venialis — Etymology, Origin & Word History | Etymology Explorer