What is amen?

"Amen" is a word commonly used in prayer and worship to express agreement or affirmation, similar to saying "yes" or "so be it". The word reportedly originated from ancient Hebrew and was used in Jewish, Christian, and Islamic religious ceremonies. "Amen" has also been adopted into many other languages, including Arabic, Spanish, French, and German. In some cultures, "amen" is also used as an expression of enthusiasm or approval.