ApollyonyoudaoicibaDictYouDict[Apollyon 词源字典]
destroying angel of the bottomless pit (a name sometimes given to the Devil), late 14c., from present participle of Greek apollyein "to destroy utterly" (from apo- "from, away from" + olluein "to destroy"); a translation of Hebrew Abaddon (q.v.).[Apollyon etymology, Apollyon origin, 英语词源]