Irminenschaft is a German word that means "the worship of the god Irmin." Irmin is an ancient Germanic deity who was believed to be a god of war, strength, and leadership. Irminenschaft is a term that refers to the spiritual beliefs and practices of people who worship and honor Irmin.
Think of it like this: some people believe in a god named Irmin, who is really strong and good at leading people in battle. These people have special ways of showing their respect and asking for help from Irmin, and that's called Irminenschaft.
People who practice Irminenschaft might have special rituals or ceremonies to honor and connect with Irmin. They might also have certain beliefs about the world and how Irmin fits into it. It's kind of like having a special club where everyone shares a love for Irmin and wants to show their appreciation for him.