The term for the fear of the unknown is "ambiguity aversion." This is a psychological concept where individuals prefer known over unknown situations, often leading to discomfort or anxiety when faced with uncertainty. This fear can manifest in various aspects of life, including decision-making, future planning, and social interactions. It significantly influences behaviors, making people resistant to change or new experiences. Understanding ambiguity aversion can help individuals confront their fears, leading to personal growth and better coping strategies in uncertain environments.