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 unfasten, as sails, from the spars or stays to which they are attached for use.-to cast loose or untie, as a rope.-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.