Sadness

General low mood, or lowered mood and activity related to personal suffering, physical state, object loss, or inability to perform a desired action.

Reference:
Gartstein, M. A., & Rothbart, M. K. (2003). Studying infant temperament via the revised infant behavior questionnaire. Infant Behavior and Development, 26(1), 64-86. doi: 10.1016/S0163-6383(02)00169-8