Mental capacity or aptitude is an important aspect of an individual's overall development. Several antonyms describe the opposite of mental incapacity, such as proficiency, ability, competency, expertise, intelligence, and understanding. These words denote an individual's sound reasoning, analytical skills, and quick-wittedness, which help them make sound judgments and sensible decisions. A person's mental capacity also determines their creativity, logical reasoning, and cognitive abilities. Therefore, enhancing one's mental capacity by developing skills, reading, and learning new things is essential to lead a more fulfilling life. By developing one's mental faculties, a person can overcome mental incapacity and become more productive, self-reliant, and successful.