straighten, unbend: straighten up or out; make straight
unbend: unfasten, as a sail, from a spar or a stay
unbend: free from flexure "unbend a bow" Antonym: bend
relax, unbend: make less taut "relax the tension on the rope"
relax, loosen up, unbend, unwind, decompress, slow down: 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"
unbend: release from mental strain, tension, or formality "unbend the mind from absorbing too much information"
