later form for δνόφος,
A darkness, Chron.Lind. D.28, Ep.Hebr.12.18, D.Chr. 34.37(pl.), Luc.Peregr.43: pl., storm-clouds, Arist.Mu.391b12.
v. δνόφος.
akin to νέφος; gloom (as of a storm): blackness.