MaranathayoudaoicibaDictYouDict[Maranatha 词源字典]
late 14c., a Bible word, from Greek maranatha, untranslated Semitic word in I Cor. xvi:22, where it follows Greek anathema, and therefore has been taken as part of a phrase and used as "a curse." Usually assumed to be from Aramaic maran atha "Our Lord has come," which would make the common usage erroneous (see OED entry), but possibly it is a false transliteration of Hebrew mohoram atta "you are put under the ban," which would make more sense in the context. [Klein][Maranatha etymology, Maranatha origin, 英语词源]