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1make or become straight from a bent or twisted form or position: [with object]: I had trouble unbending my cramped knees [no object]: he unbent from the cockpit
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[no object] become less reserved, formal, or strict: you could be fun too, you know, if you’d only unbend a little
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2 [with object] Sailing unfasten (sails) from yards and stays.
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untie or cast loose (a rope or cable).