1) River 2) River cocytus 
Cocytus or Kokytos, meaning `the river of wailing` (from the Greek Κωκυτός, `lamentation`), is a river in the underworld in Greek mythology. Cocytus flows into the river Acheron, across which is the underworld, the mythological abode of the dead. There are five rivers encircling Hades. The River Styx is perhaps the most famous; the othe...
the underworld River of Wailing.
In Greek mythology, one of the rivers of the underworld, a tributary of the Acheron. The name, which means wailing, refers to the cries of the dead. ...
In Greek mythology cocytus (river of lamentation) was one of the five rivers of hell. The unburied were doomed to wander about its banks for 100 years.
[n] - (Greek mythology) a river in Hades that was said to be a tributary of the Acheron
River Cocytus noun (Greek mythology) a river in Hades that was said to be a tributary of the Acheron
One of several Rivers of Underworld.