Okay kiddo, so a motto is a sentence or phrase that people believe in and use to guide their behavior. The word “tripartite” means “divided into three parts”.
So a tripartite motto is a motto that has three parts or three ideas. It’s like having three different sentences that work together to help you be a good person.
For example, one famous tripartite motto is “liberté, égalité, fraternité” which means “liberty, equality, fraternity” in French. These three ideas are all really important and work together to help people live happy and fair lives.
So basically, a tripartite motto is just a special type of motto that has three important ideas that people want to live by.