The River Styx (Greek: Óôýî, Stux, also meaning 'hate' and 'detestation') was a river in Greek mythology which formed the boundary between Earth and the Underworld (often called Hades which is also the name of this domain's ruler).
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Hades (Άδης or Ἀΐδας; from Greek ᾍδης, Hads, originally Ἅιδης, Haids or Άΐδης, Aids, meaning "the unseen"[1][2]) refers both to the ancient Greek underworld, the abode of Hades, and to the god of the underworld. Hades in Homer referred just to the god; the genitive ᾍδου, Haidou, was an elision to denote locality: "[the house/dominion] of Hades". Eventually, the nominative, too, came to designate the abode of the dead.
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