prosaic (adj.)youdaoicibaDictYouDict[prosaic 词源字典]
1650s, "having to do with prose," from Middle French prosaique and directly from Medieval Latin prosaicus "in prose" (16c.), from Latin prosa "prose" (see prose). Meaning "having the character of prose (in contrast to the feeling of poetry)" is by 1746; extended sense of "ordinary" is by 1813, both from French.[prosaic etymology, prosaic origin, 英语词源]