Resilience

Merriam Webster - an ability to recover from or adjust easily to misfortune or change.

Wiki - Psychological resilience is an individual's tendency to cope with stress and adversity. This coping may result in the individual "bouncing back" to a previous state of normal functioning, or simply not showing negative effects. A third, more controversial form of resilience is sometimes referred to as 'posttraumatic growth' or 'steeling effects' where in the experience adversity leads to better functioning (much like an inoculation gives one the capacity to cope well with future exposure to disease). Resilience is most commonly understood as a process, and not a trait of an individual.