Assuredness breeds confidence, while its opposite, un-assuredness, often leads to hesitation and self-doubt. As such, it can be useful to identify antonyms - words that express the opposite meaning - for un-assured. Some possibilities include: certain, conclusive, confident, decisive, dogmatic, positive, unambiguous, and unequivocal. Each of these words expresses a sense of certainty or conviction, providing a counterbalance to the shiftiness and uncertainty of un-assuredness. Developing a vocabulary of antonyms can help individuals to better articulate their thoughts and feelings, and to cultivate a stronger sense of self-assurance.