a. [ L. Stygius, fr. Styx, Stygis, Gr. Sty`x, Stygo`s, the Styx. ] Of or pertaining to the river Styx; hence, hellish; infernal. See Styx. [ 1913 Webster ]
At that so sudden blaze, the Stygian throng Bent their aspect. Milton. [ 1913 Webster ]