adj. foul
adv. foully
n. foulness
v. to befoul, make or become foul

Paaz Keizaal fen kos stin nol bein Alduin jot.
Fair Skyrim will be free from foul Alduin's maw.
(Book, Songs of Skyrim)

Het nok bein nahgahdinok Azaran faal Munax, wo unt wah Gron krilot dilon do Sovngarde wah lein do ul, ahrk funt.
Here lies the foul necromancer Azaran the Cruel, who tried to Bind the valiant dead of Sovngarde to the world of man, and failed.
(Word Wall for Gron, Become Ethereal)

Describes a foul character, purpose, or deed, not a foul smell.