コロス

noun

chorus (esp. in Greek drama); choir

Primarily refers to the chorus in ancient Greek drama, but can also mean a choir or singing group in a broader sense.

from Greek choros

• ギリシャ悲ひ劇げきでは、コロスが物もの語がたりの進しん行こうに重じゅう要ような役やく割わりを果はたす。

  In Greek tragedy, the chorus plays an important role in advancing the story.