(adj.adj.) : Styx, ygis and ygos, f., = Στύξ.
* A fountain in Arcadia, the icy-cold water of which caused death, Plin. 2, 103, 106, § 231; Sen. Q. N. 3, 25, 1; Vitr. 8, 3, 16; Just. 12, 14, 7; Curt. 10, 10, 17.
* In mythology, a river in the infernal regions, by which the gods swore, Cic. N. D. 3, 17, 43; Verg. G. 4, 480; Ov. M. 12, 322; id. A. A. 1, 635; Sil. 13, 570; Stat. Th. 8, 30; id. Achill. 1, 269 al.— Hence, poet., the infernal regions, the lower world, Verg. G. 1, 243; Ov. M. 10, 13; id. P. 4, 8, 60; id. Tr. 5, 2, 74; Mart. 4, 60, 4; and for poison: miscuit undis Styga Sidoniis,Sen. Oedip. 163.—Hence
* Stygĭus, a, um, adj., of or belonging to the Styx, Stygian; and poet., of or belonging to the lower world, infernal: palus,Verg. A. 6, 323: aquae,id. ib. 6, 374: torrens,Ov. M. 3, 290: cymba,i. e. of Charon,Verg. G. 4, 506; so, carina,id. A. 6, 391: Juppiter,i. e. Pluto,id. ib. 4, 638; cf. id. ib. 6, 252: frater,id. ib. 9, 104: Juno,i.e. Proserpine,Stat. Th. 4, 526: canes,Luc. 6, 733: manes,Val. Fl. 1, 730: umbrae,Ov. M. 1, 139.—Hence, poet., deadly, fatal, pernicious, awful, etc.: vis,Verg. A. 5, 855; cf. nox,i. e. death,Ov. M. 3, 695: bubo,id. ib. 15, 791 et saep.—*
* Stygĭālis, e, adj., Stygian: sacra,Verg. Cir. 373.