The word "more welldone" does not have a specific antonym, as it is not a commonly used term. However, if we break down the word "welldone" into its individual components, we can come up with potential antonyms. For example, "well" could be considered the opposite of "poorly" or "badly," while "done" could be considered the opposite of "undone" or "unfinished." Therefore, the antonyms for "more welldone" could include "more poorly done," "more badly done," "less well-done," "undone," or "unfinished." Ultimately, it is important to consider the context in which the word is being used in order to determine the most appropriate antonym.