The opposite of overestimating is underestimating. It means that a person might undervalue someone's abilities or underestimate the time needed to complete a task. Underestimating can lead to poor decision-making and failure to achieve targets. Other antonyms of overestimating include underestimation, underrating, and belittling. Focusing on realistic expectations and acknowledging limitations is important to avoid overestimation. Instead of assuming the best-case scenario, it is necessary to consider all possibilities and make informed decisions. It is also necessary to trust data and figures while avoiding over-relying on intuition or assumptions. By doing this, a person can prevent mistakes and succeed in their endeavors.