What is another word for render unintelligible?
Pronunciation: [ɹˈɛndəɹ ˌʌnɪntˈɛlɪd͡ʒəbə͡l] (IPA) 
There are many synonyms for the term "render unintelligible," which essentially means to make something incomprehensible or unclear. Some common synonyms include: obfuscate, obscure, confuse, muddle, garble, jumble, scramble, distort, cloud, and confound. These words can all be used to describe a variety of situations where communication or understanding is impeded, whether it be through speech, writing, or other forms of media. While each of these synonyms may have slightly different connotations or nuances, they all convey the idea that something is being made difficult to comprehend or decipher. By using these synonyms in place of "render unintelligible," writers and speakers can add variety and specificity to their language.
