stygian

Gloomy and dark.

Infernal; hellish.

Of or relating to the river Styx.

Pertaining to the Styx, a river, according to the ancient myth, flowing around the lower world, the waters of which were used as a symbol in the most binding oaths of the gods.

Hence Infernal; hellish: as, Stygian vapors; a Stygian pool.

Of or pertaining to the river Styx; hence, hellish; infernal. See Styx.

Dark and gloomy.

Infernal or hellish.

hellish