To free from flexure; to make, or allow to become, straight; to loosen; as, to unbend a bow.
A remit from a strain or from exertion; to set at ease for a time; to relax; as, to unbend the mind from study or care.
To cease to be bent; to become straight or relaxed.
To relax in exertion, attention, severity, or the like; hence, to indulge in mirth or amusement.
straighten up or out; make straight
make less tight; "relax the tension on the rope"
become less tense, rest, or take one's ease; "He relaxed in the hot tub"; "Let's all relax after a hard day's work"
release from mental strain, tension, or formality; "unbend the mind from absorbing too much information"