What is the X in X-mas?
late 14c., "action of combining," also "manner in which a thing is composed," from Old French composicion (13c., Modern French composition) "composition, make-up, literary work, agreement, settlement," from Latin compositionem (nominative compositio) "a putting together, connecting, arranging," noun of action from past participle stem of componere (see composite). Meaning "art of constructing sentences" is from 1550s; that of "literary production" (often also "writing exercise for students") is from c.1600. Printing sense is 1832; meaning "arrangement of parts in a picture" is from 1706.
in ancient Germanic law, money given to a person who had been wronged or injured by the person responsible for the act. Composition arose among the Germanic peoples as an alternative to blood feud and personal vengeance. The amount paid was determined by a man's worth, or wer, which in turn was determined by his status in society. If he died, the money went to his family; in certain cases part went to the lord or king, as compensation for loss of a vassal. Although the right to composition and the amount paid originally arose out of an agreement between the parties involved, these issues were later settled by law. See also wergild.