LATIN DICTIONARYLexicon Latīnum
proper noun · femininethird declension

Styx

Styx f sg (genitive Stygis or Stygos)
Classical[ˈstyks]Ecclesiastical[ˈstiks]

Meaning

  1. femininesingularThe river Styx

Latīnē defined in Latin in our graded readers

flūmen īnferōrum, per quod deī iūrant
Styx -ygis (f) — in Metamorphoses I, ch. 4

Declension

declension
formsingularplural
nominativeStyx—
genitiveStygos
Stygis		—
dativeStygī—
accusativeStyga
Stygem		—
ablativeStyge—
vocativeStyx—

Styx, ўgis and ўgos, f., = Στύξ.
I. 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.—
II. 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,
1. Stўgĭus, 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.—*
2. Stўgĭālis, e, adj., Stygian: sacra, Verg. Cir. 373.

Origins

Borrowed from Ancient Greek Στύξ (Stúx).

In the Academy Smith's classical dictionaries

GeographyStyxStyx (Στύξ), a waterfall descending from a lofty rock in the Aroanian mountains, above Nonacris, a town in the NE. of Arcadia, in the district of Phen…Biography & mythologyStyxStyx (Στύξ), connected with the verb στυγέω, to hate or abhor, is the name of the principal river in the nether world, around which it flows seven tim…

Quick answers

What does Styx mean in Latin?
Styx, a proper noun, means “The river Styx”.
What is the genitive of Styx?
The genitive singular is Stygis. Styx is feminine, third declension.
How do you pronounce Styx?
In classical Latin, [ˈstyks]; in ecclesiastical (church) Latin, [ˈstiks].