preacher (n.)youdaoicibaDictYouDict[preacher 词源字典]
c. 1200, from Old French preecheor "preacher" (Modern French prêcheur), from Latin praedicatorem (nominative praedicator) "public praiser, eulogist," literally "proclaimer" (see preach). Slang short form preach (n.) is recorded by 1968, American English.[preacher etymology, preacher origin, 英语词源]