oration (n.)youdaoicibaDictYouDict[oration 词源字典]
late 14c., "prayer," from Late Latin orationem (nominative oratio) "a speaking, speech, discourse; language, faculty of speech, mode of expressing; prayer," noun of action from past participle stem of Latin orare "to pray, plead, speak before an assembly" (see orator). Meaning "formal speech, discourse" first recorded c. 1500.[oration etymology, oration origin, 英语词源]