Bismillahir Rahmanir Rahim. Alhamdulillahi rabbil-'alamin. Was-Salatu was-Salam 'ala Sayyidina wa Azimina, Wa Habibi Qulubina wa Shafii Nufusina, Abul Qasim Muhammad. Wa 'ala Ahli Bayti tayyibina tahireen.
It seems to me that "Amen" is originally not Arabic word. Meybe it was adopted into Arabic from Hebrew?
So the question is, Is "Amen" originally Arabic word?
Or, was "Amen" originally Arabic word at the time of the Prophet Muhammad SAW?
Wikipedia says it is originally Hebrew word. I hope experts of Arabic language will respond to my inquiry.