proem (n.)youdaoicibaDictYouDict[proem 词源字典]
late 14c., proheme "brief introduction, prelude," from Old French proheme (14c., Modern French proème), from Latin prooemium, from Greek prooimion "prelude" to anything, especially music and poetry, from pro- "before" (see pro-) + oimos "way" or oime "song."[proem etymology, proem origin, 英语词源]