Cocytus or Kokytos (Κωκυτός, lit. "lamentation") is a river in the underworld in Greek mythology.
In Inferno, the first part of Dante Alighieri's Divine Comedy, Cocytus is the ninth and lowest circle of Hell where traitors are frozen in a lake of ice. Dante's Satan is imprisoned waist deep in ice at the very center of Hell.
Usage
See Special:Whatlinkshere/Etymology:Cocytus for a list of articles using this term.
This is an etymology page: a page detailing the origins of terminology used in the series in regards to real world culture and history.