Definitions from Wiktionary ( )

▸ verb:  To remove a bend so as to make, or allow to become, straight.
▸ verb:  To release (a load) from a strain or from exertion; to set at ease for a time; to relax.
▸ verb:  (nautical) To unfasten sails from the spars or stays to which are attached for use.
▸ verb:  To cast loose or untie
▸ verb:  To cease to be bent; to become straight.
▸ verb:  To relax in exertion, attention, severity, or the like
▸ verb:  (archaic) to enjoy oneself; to become affable and free from formality

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