The antonyms for "un-worthiest" are "worthiest" or "most worthy." These words describe something or someone who is deserving of praise, honor, or respect. When we say someone is the "worthiest," we imply they are the most deserving of some recognition for their good deeds or qualities. For example, a person who has dedicated their lives to serving their community might be said to be the "worthiest" of all volunteers. It's important to note that there are no "un-worthiest" people or things. Instead, we should focus on identifying and celebrating the qualities that make someone or something worthy of our admiration.