Uncertainty

An aversive state that people are motivated to reduce arising from the lack of information about an event. Contrast with fear, worry, and anxiety.

Reference:

Bar-Anan, Y., Wilson, T. D., & Gilbert, D. T. (2009). The feeling of uncertainty intensifies affective reactions. Emotion, 9(1), 123-127. https://psycnet.apa.org/doi/10.1037/a0014607