The word "most elucidatory" refers to something that is highly explanatory or clear. Therefore, its antonyms would be words that indicate the opposite - confusion, ambiguity, or obscurity. Some possible antonyms for "most elucidatory" might include terms such as confusing, unclear, ambiguous, perplexing, or opaque. These words are often used to describe situations, concepts or ideas that lack clarity or are difficult to comprehend. When trying to convey an idea, it is important to use language that is easily understood, so learning the antonyms of key words like "most elucidatory" can be helpful in achieving this goal.