Antonyms for "renders unintelligible" include "clarifies," "elucidates," "explains," "deciphers," "decodes," "interprets," "translates," "simplifies," "relates," and "interprets." When someone renders something unintelligible, they make it difficult or impossible to understand. On the other hand, by clarifying or elucidating something, one makes the meaning clear and easy to comprehend. Deciphering or decoding jumbled messages also achieves this goal. By interpreting or translating, one can make a foreign language or complex information more accessible. Simplifying and relating information, by breaking it down or connecting it to familiar concepts or contexts, can also make it easier to understand.