The term "un-believes" refers to the act of refusing to accept or have faith in something. There are several synonyms for this word, including disbelieves, doubts, mistrusts, questions, and rejects. Disbelieves suggests a lack of trust in something, while doubts often refer to uncertainties about the truth or reliability of a statement. Mistrusts imply a general sense of skepticism towards something or someone, while questions refer to the process of seeking clarification or validation of a statement. Rejects, on the other hand, implies an outright refusal to believe or accept something. All these words provide various ways to describe the refusal to accept something as true or credible.