“Amen” is a Hebrew word that stems from the word aman, which means “to be faithful, support, or confirm.” The word “amen” actually means, “so be it,” or “truly.” Therefore, when we end our prayers with "amen," we are re-affirming our dedication to God through Jesus Christ. We also use it to confirm a statement (i.e., when the pastor says something powerful out of the Word of God, and members of the congregation say "Amen").
Totoy's Inks and Needles