PhlegethonyoudaoicibaDictYouDict[Phlegethon 词源字典]
"Something regarded as resembling the mythical river Phlegethon; a river of fire, a seething torrent or turmoil", Early 19th cent.; earliest use found in Lord Byron (1788–1824), poet. From Phlegethon (classical Latin Phlegethont-, Phlegethōn, ancient Greek Φλεγέθοντ-, Φλεγέθων, lit. ‘burning, blazing’), the name of a mythological river of fire, one of the five rivers of Hades.[Phlegethon etymology, Phlegethon origin, 英语词源]