The word "un-disputed" refers to something that is accepted and acknowledged without any disagreement. Its antonyms refer to the opposite of this meaning. Disputed, contested, challenged, or disputed disputed are some of the antonyms of undisputed. If something is disputed, it means that there is a disagreement or uncertainty, and it cannot be accepted without question. Similarly, something that is challenged is questioned due to doubts or concerns raised by one or more parties. Therefore, the antonyms of undisputed denote the presence of opposition or controversy, which is absent in its meaning.