Strong’s Hebrew Lexicon:

Amen (Amein): אָמֵן ʼâmên, aw-mane’; from H539; sure; abstract, faithfulness; adverb, truly:—Amen, so be it, truth. https://www.blueletterbible.org/lexicon/h543/kjv/wlc/0-1/

The significance of the Hebrew Name YHWH: (Replaced with Lord ~7000 times in scripture)

The Name Given to Moses, by the ‘Elohiym of the Bible, YHWH (YHVH), or (YH) in abbreviated form; for all to experience..

I AM THAT I AM or WILL BE, ETC.“According to the Hebrew Bible, in the encounter of the burning bush (Exodus 3:14) Moses asks what he is to say to the Israelites when they ask what ‘gods’ (‘Elohiym) have sent him to them, and YHWH replies, “I am who I am”, adding, “Say this to the people of Israel, ‘I am has sent me to you.’ ”The Name that is ‘the spirit’ (ha-ruwach: the expression of, the mind of, etc..), the Word and Works of, the Bible’s true ‘Elohiym!

“I AM THAT I AM”

Source (Interpretation section): https://en.wikipedia.org/wiki/I_Am_that_I_Am