Languishing

The absence of mental health in life. Languishing is a state where an individual is not experiencing mental illness, but also having low levels of emotional, psychological, and social well-being.

Reference:

Keyes, C. L. (2002). The mental health continuum: From languishing to flourishing in life. Journal of Health and Social Behavior, 207-222. https://doi.org/10.2307/3090197