"Outwitted" describes someone who has been cleverly and successfully defeated or tricked. The antonyms for "outwitted" would include terms that describe individuals who have successfully overcome challenges or outsmarted their opponents. Some suitable antonyms for "outwitted" might include "outsmarted," "succeeded," "triumphed," "prevailed," "conquered," or "outmaneuvered." These words imply that the person in question was able to effectively overcome an obstacle or opponent, using their intelligence, cunning, or other skills to achieve victory. Unlike "outwitted," which often implies a sense of defeat or loss, the antonyms listed here carry a more positive connotation, highlighting the individual's success and accomplishment.