The word "most unassured" means feeling uncertain or insecure about something. Some antonyms for this word could be "confident," "assured," "secure," "self-assured," or "certain." These are all words that describe a feeling of confidence in oneself and one's abilities. When we are confident, we feel certain and sure of our decisions and actions. This type of confidence can come from experience, knowledge, or a strong sense of self-worth. The opposite of feeling uncertain and unassured is feeling confident and self-assured, which allows us to take risks and pursue our goals without fear of failure.