Maranatha

Maranatha (Aramaic: either מרנא תא: maranâ thâ' or מרן אתא: maran 'athâ' , Greek: Μαραναθα) is a two-word Aramaic formula occurring only once in the New Testament (see Aramaic of Jesus) and also in the Didache, which is part of the Apostolic Fathers' collection. It is transliterated into Greek letters rather than translated and, given the nature of early manuscripts, the lexical difficulty lies in determining just which two Aramaic words constitute the single Greek expression, found at the end of Paul's First Epistle to the Corinthians (1 Cor 16:22 ).

If one chooses to split the two words as מרנא תא (maranâ thâ), a vocative concept with an imperative verb, then it can be translated as a command to the Lord to come. On the other hand, if one decides that the two words מרן אתא (maran 'athâ), a possessive "Our Lord" and a perfect/preterite verb "has come," are actually more warranted, then it would be seen as a credal expression. This interpretation, "Our Lord has come," is supported by what appears to be an equivalent of this in the early credal acclamation found in the biblical books of Romans 10:9 and 1 Corinthians 12:3, "Jesus is Lord."

In general, the recent interpretation has been to select the command option ("Come, Lord!"), changing older decisions to follow the preterite option ("Our Lord has come") as found in the ancient Aramaic Peshitta, in the Latin Clementine Vulgate, in the Greek Byzantine texts, Textus Receptus, critical Greek texts like Westcott and Hort, Tischendorf, Cambridge, etc., and in the English translations like the King James Version, the Finnish Raamattu, etc.

The NRSV of 1 Cor 16:22 translates the expression as: "Our Lord, come!" but notes that it could also be translated as: "Our Lord has come"; the NIV translates: "Come, O Lord"; the Message version puts it differently as: "Make room for the Master!" [1]; the NAB notes:

...
Wikipedia