名詞 pandemonium:

1. a state of extreme confusion and disorder
   同義詞：chaos, bedlam, topsy-turvydom, topsy-turvyness

1. There was pandemonium when the news was announced.
   消息宣布後一片混亂。
2. Pandemonium reigned in the classroom until the teacher arrived.
   教師來到之前教室里亂哄哄的。

pandemonium 也作 pan.dae.mo.ni.um

n.（名詞）
A very noisy place:
嘈雜的地方：
例句：
.The whole lobby was a perfect pandemonium, and the din was terrific.(Jerome K. Jerome)
.整個(gè)門廳一片嘈雜，而且喧囂刺耳.(杰羅姆K.杰羅姆)

Wild uproar or noise.See Synonyms at noise
吵雜：狂亂的喧鬧或吵鬧參見 noise

來源：
From Pandômonium [capital of Hell in] Paradise Lost, an epic poem by John Milton
源自 Pandômonium [約翰·彌爾頓所寫的敘事詩] 迷失伊甸園 中地獄的中心
Greek pan- [pan-]
希臘語 pan- [前綴，表.整個(gè)，全部.]
Late Latin daemonium [demon] from Greek daimonion from daimôn [lesser god, demon] * see demon
后期拉丁語 daemonium [惡魔] 源自 希臘語 daimonion 源自 daimôn [不太重要的神，鬼] *參見 demon

【引伸】
pan.demo.niac