acheron

noun

1. Classical Mythology. a river in Hades over which Charon ferried the souls of the dead.
2. the infernal regions; hell; Hades.

noun Greek myth

1. one of the rivers in Hades over which the souls of the dead were ferried by CharonCompare Styx
2. the underworld or Hades

1580s, fabled river of the Lower World in Greek mythology. The name perhaps means “marsh-like” (cf. Greek akherousai “marshlike water”); the derivation from Greek akhos “woe” is considered folk etymology.