Stygian

adj 1: hellish; "Hence loathed Melancholy.../In Stygian cave

forlorn"- Milton [syn: {Stygian}]

2: dark and dismal as of the rivers Acheron and Styx in Hades;

"in the depths of an Acheronian forest"; "upon those

roseate lips a Stygian hue"-Wordsworth [syn: {Acheronian},

{Acherontic}, {Stygian}]