Betongue is not a widely recognized word. However, if you were to use it in a theoretical context, there are several synonyms you could use to convey the same meaning. For example, the word 'obfuscate' is similar in meaning, which means to make something unclear or difficult to understand. Another synonym could be 'confuse,' which means to make someone feel uncertain or bewildered. Other potential synonyms include 'baffle,' 'muddle,' 'bewilder,' and 'fuddle.' Each of these words carries a similar meaning as betongue, and choosing the right one will depend on the context of your writing.