Where does “obscène” come from?

obscène (Middle French) comes from Latin obscenus, from Proto-Indo-European ḱweyn- — to make dirty, soil; filth; mud; to soil; mud;...

Ancestry of “obscène”, step by step

Step	Language	Word	Meaning
1	Latin	obscenus	inauspicious, ominous, portentous; repulsive,...
2	Proto-Indo-European	ḱweyn-	to make dirty, soil; filth; mud; to soil; mud;...