French word affreux comes from French -eux (-ous, -y.), French affre

Detailed word origin of affreux

Dictionary entry	Language	Definition
-eux	French (fra)	-ous, -y.
affre	French (fra)
affreux	French (fra)	Frightful, causing fear. Repulsive. Terrible, rubbish, awful.

Words with the same origin as affreux