Devilise is a rather rare word that refers to the act of turning something or someone evil or wicked. Although it may not be commonly used, there are several synonyms that convey a similar meaning. One such synonym is demonize, which means to portray or represent as wicked, evil, or malevolent. Another synonym for devilise is corrupt, which denotes the act of causing someone or something to become immoral or dishonest. Transforming something into a sinful or nefarious entity is also conveyed by words like pervert, taint, and defile. Regardless of which synonym is used, they all refer to the act of turning something towards the dark or wicked side.