The word "dull-witted" refers to someone who lacks intelligence or mental sharpness. Some antonyms for this word include "clever," "smart," and "brilliant." Clever individuals are known for their quick thinking and problem-solving abilities as they apply their wit to overcome obstacles. Smart people are characterized by their intelligence and mental agility, able to learn quickly and retain knowledge effectively. Brilliant individuals exhibit a genius-level of intellectual ability and are often admired for their creativity and innovation. Other antonyms for "dull-witted" could include "sharp," "astute," "ingenious," and "intelligent." These words emphasize the opposite qualities of someone who is considered to be dull-witted.