pandemoniumyoudaoicibaDictYouDict[pandemonium 词源字典]
pandemonium: [17] Pandemonium was coined by John Milton as the name for the capital of Hell in his poem Paradise lost 1667: ‘Meanwhile the winged heralds … throughout the host proclaim a solemn council forthwith to be held at Pandaemonium, the high capital of Satan and his peers’. He formed it from the prefix pan- ‘all’ and Greek daímōn ‘demon’ – hence ‘place of all the demons’. The modern colloquial use of the word for ‘uproar’ developed in the mid-19th century.
=> demon[pandemonium etymology, pandemonium origin, 英语词源]
pandemonium (n.)youdaoicibaDictYouDict
1667, Pandæmonium, in "Paradise Lost" the name of the palace built in the middle of Hell, "the high capital of Satan and all his peers," coined by John Milton (1608-1674) from Greek pan- "all" (see pan-) + Late Latin daemonium "evil spirit," from Greek daimonion "inferior divine power," from daimon "lesser god" (see demon).

Transferred sense "place of uproar" is from 1779; that of "wild, lawless confusion" is from 1865. Related: Pandemoniac; pandemoniacal; pandemonian; pandemonic.