the GNU version of the Collaborative International Dictionary of English
adj. Of or pertaining to the river Styx; hence, hellish; infernal. See Styx.
The Century Dictionary and Cyclopedia
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.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. hellish
adj. dark and dismal as of the rivers Acheron and Styx in Hades
Word Usage
"Too many words Kevin, too many adjectives chased down the 'stygian' gloom of your thought processes."