Antonyms for "muddying the waters" include words like clarify, explain, elucidate, disentangle, and simplify. These words are used to describe the act of making something clearer, so that it can be easily understood. When someone is muddying the waters, they are generally creating confusion or obfuscating the issue at hand. The opposite of this would be to provide clear and concise information that helps to illuminate the topic. By using antonyms like these, we can better understand the importance of clear communication, and strive to be more effective when sharing our ideas and thoughts with others.