What Amen Means to God and to the devil

Well, it's our year of HESED, the loving-kindness of God. As we give God our January to secure the rest of the year, one of our key practices is prayer because prayer isn't part of our ministry; it is our ministry. A word we often use in prayer—possibly the most frequently spoken by believers—is "Amen" However, it’s fair to say that many don't fully grasp the profound significance of this simple yet powerful word. So, what does "Amen" actually mean?