Definitions
1.VerbTo remove a bend so as to make, or allow to become, straight."to unbend a bow"
2.VerbTo release (a load) from a strain or from exertion; to set at ease for a time; to relax."to unbend the mind from study or care"
3.VerbTo unfasten sails from the spars or stays to which are attached for use.
4.VerbTo cast loose or untie"Unbend the rope."
5.VerbTo cease to be bent; to become straight.
6.VerbTo relax in exertion, attention, severity, or the like
7.Verbto enjoy oneself; to become affable and free from formality