Un-trusting, the feeling of not being able to trust someone or something, can be expressed with a variety of synonyms. Words like skeptical, suspicious, and hesitant are commonly used to describe the feeling of un-trusting. Other synonyms for un-trusting include wary, apprehensive, and doubtful. Individuals who are un-trusting may also be described as cautious, guarded, or reluctant. The term incredulous can also be used to express a sense of disbelief or mistrust. While these synonyms may vary in their intensity, they all convey a similar sense of uncertainty and unease, which can be a natural response when trust has been betrayed or is lacking.