Stygian

['stɪdʒɪən]

(adj.) hellish; 'Hence loathed Melancholy.../In Stygian cave forlorn'- Milton .

Typist: Perry--From WordNet

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

Edited by Arnold

a. Hellish, infernal, diabolical.

Checked by Amy

adj. relating to Styx one of the rivers of Hades across which Charon ferries the shades of the departed: hellish infernal deadly impenetrable.

Editor: Wendell