n. shadow; darkness

Alduin, feyn do jun, kruziik vokun staadnau, voth aan bahlok wah diivon fin lein!
Alduin, Bane of Kings, ancient shadow unbound, with a hunger to swallow the world!
(Book, Songs of Skyrim)

Associated with darkness and doom, possibly also evil.

From kun ‘light’ with the prefix vo- ‘un-, opposite of’.

Namesake of one of the eight dragon priest masks.