The word amen (“so be it; truly”) is a declaration of affirmation found in the Bible. Its use in Judaism dates back to its earliest texts. It has been generally adopted in Christian worship as a concluding word for prayers and hymns. In Islam (Arabic: آمين, ʾāmīn), it is the standard ending to Dua (supplication). Common English translations of the word amen include “verily” and “truly”. It can also be used to express strong agreement, as in “amen to that“.
Amen is also considered to be a derivative of the name of the Egyptian god Amun (Amen, Amon). Some believe that amen shares roots with the Sanskrit Aum.
Amun (Amen, Amon) was attested since the Old Kingdom together with his spouse Amaunet. With the 11th dynasty (ca. 21st century BC), he rose to the position of patron deity of Thebes. Amun acquired national importance, expressed in his fusion with the Sun god Ra, as Amun-Ra.
Amun-Ra retained chief importance in the Egyptian pantheon throughout the New Kingdom (with the exception of those still worshipping Aten). His position as King of Gods developed to the point of virtual monotheism where other gods became manifestations of him. With Ausar (Osiris) and Aten-Ra, Amun-Ra is among the most widely recorded of the Egyptian gods. As the chief deity of the Egyptian Empire, Amun-Ra also came to be worshipped outside of Egypt, in Ancient Libya and Nubia, and as Zeus Ammon came to be identified with Zeus in Ancient Greece.
Amun and Amaunet are mentioned in ancient Egyptian pyramid texts, representing the primordial concept or element of air or invisibility (corresponding to Shu in the Ennead), hence Amun’s later function as a wind deity, and the name Amun (written imn), meaning “hidden”.