verb

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