The word "more unchallenged" implies that something was already unchallenged but has now become even more so. To find antonyms for this phrase, we need to consider words that suggest the opposite situation. Some possible antonyms include "disputed," "contested," "disputed," "questioned," and "challenged." If something is disputed, it means that there is an ongoing debate or argument around it. Something that is contested is being challenged or opposed by another party. If something is questioned, it implies that doubt has been raised about its validity. And when something is challenged, it means that someone is directly opposing it or asserting a different perspective. All of these antonyms suggest active engagement and conflict - in contrast to the idea of unchallenged silence.