un·bend / ˌənˈbend/ • v. (past and past part. -bent ) 1. make or become straight from a bent or twisted form or position: [tr.] I had trouble unbending my cramped knees | [intr.] he unbent from the cockpit as she passed. ∎ [intr.] become less reserved, formal, or strict: you could be fun too, you know, if you'd only unbend a little. 2. [tr.] Sailing unfasten (sails) from yards or stays. ∎ cast (a cable) loose. ∎ untie (a rope).