Fear

An emotion that arises from appraisals of situations as being uncertain and beyond individual control, motivating escape or protective behaviours that maximize safety and security.

Reference:
Izard, C. E. (1992). Basic emotions, relations among emotions, and emotion-cognition relations. Psychological Review, 99(3), 561-565. http://dx.doi.org/10.1037/0033-295X.99.3.561

Bowlby, J. (1973). Attachment and Loss: Vol. 2. Separation and Anger. New York: Basic Books

Lerner, J. S., & Keltner, D. (2001). Fear, anger, and risk. Journal of Personality and Social Psychology, 81(1), 146-159. doi: 10.1037//O022-3514.81.1.146.