amen
Old English, from Late Latin amen, from Ecclesiastical Greek amen, from Hebrew amen "truth," used adverbially as an expression of agreement (as in Deut. xxvii:26, I Kings i:36; compare Modern English verily, surely, absolutely in the same sense), from Semitic root a-m-n "to be trustworthy, confirm, support." Used in Old English only at the end of Gospels, otherwise translated as Soðlic! or Swa hit ys, or Sy! As an expression of concurrence after prayers, it is recorded from early 13c.