Phlegethon
Proper noun
Meaning
Phlegethon
(Greek mythology) A river of fire in Hades.
Synonym: Pyriphlegethon
Synonyms
Examples
He leads the centaurs in Hell 's Circle of Violence where they fire their arrows at any of the damned that try to escape from the Phlegethon.
Virgil describes it in the Aeneid as a gigantic place, surrounded by the flaming river Phlegethon and triple walls to prevent sinners from escaping from it.