Unpersuade is a word that is rarely used in everyday language, and therefore, it can be challenging to find synonyms for it. However, there are several terms that can be used interchangeably with unpersuade, such as dissuade, discourage, deter, and dissuasion. All of these words share the same idea of distorting or preventing someone from being convinced of something. Additionally, we can use other synonyms such as change their mind, sway, or convince them otherwise. Pragmatically, whether you use the word unpersuade or any of its synonyms depends on the context in which it is used.