Nix

(·f) One of a class of water spirits, commonly described as of a mischievous disposition.

nix
nix, nĭvis, f. [cf. Gr. νίφα (acc.), snow; Lat. ningit, ninguit], snow. I Lit.: Anaxagoras nivem ni...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
nix
nix nivis, f NIGV-, snow : nigra: Liger ex nivibus creverat, Cs.: miles nivibus obrutus, L.: durat...

An Elementary Latin Dictionary