Like most other Jewish prayers, this one ends with the adverb "amen" meaning "truly" or "surely." Amen comes from a root word (aman) meaning to nourish, support, and to make sure and strong. The Hebrew word for faithfulness, emunah, comes from this same root.
The Jewish sages teach that "amen" can be thought of as an acronym for el melekh ne'eman, "God is a faithful King," a phrase said every day before the Shema is personally recited. And indeed the Lord Jesus is "the Amen, the faithful and true witness" (Revelation 3:14) who has shown us the power and the glory of the One who is to be worshipped forever in Spirit and in truth.