The verb "regain" means to recover or obtain something that was previously lost, taken away, or misplaced. It can also mean to re-establish a condition, position, or advantage that had been lost or diminished. For example, if someone loses their job and then finds another one, they have regained employment. If a person is sick but gets better, they have regained their health. The word "regain" can also refer to the act of reclaiming something that was previously owned but lost or taken away.