Rendering unintelligible means making something unclear or confusing. Antonyms for this phrase would include making clear, revealing, simplifying, clarifying, explaining, deciphering, and understanding. These words imply that the meaning is becoming more understandable rather than difficult to comprehend. For example, a teacher might simplify a complex concept in a way that clarifies rather than confuses the students. Similarly, a translator might decipher a difficult language, making it understandable to an entirely new audience. Overall, the antonyms for rendering unintelligible are focused on making something clear, attaining understanding, and improving accessibility.