The Yiddish word naches is commonly used to express pride in someone else's success. Your grandma is going to get so much naches watching you sing in the school talent show!
Derived from the Hebrew nakhat, "contentment," naches literally means "calm, tranquillity, or peace." It's commonly used for the specific pleasure that comes from watching a person in your family, especially your own child, do something that makes you proud of them. Your parents will definitely shep naches, or take pride, in watching you graduate with your class.