Most vanquished means the highest number of defeats or losses. The antonyms for this term would be the terms indicating the lowest number of defeats and the highest number of victories. Some of the antonyms for most vanquished would be, undefeated, victorious, successful, triumphant, and conqueror. These words describe someone or something that has not experienced any losses or defeat. They have constantly succeeded and surpassed their expectations. Most vanquished tends to have a negative connotation, while its antonyms have a positive and uplifting meaning, which can inspire and motivate individuals to push themselves further and achieve their goals.