TIGHTROPE

[noun] [C] - a tightly stretched wire or rope fixed high above the ground, which skilled people walk across, esp. in order to entertain othersCharles Blondin crossed Niagara Falls on a tightrope in 1859.One of the acrobats who walked the tightrope at the circus did it blindfolded.Tightrope walkers often carry long poles to help themselves balance.If you walk/tread a tightrope, you have to deal with a difficult situation, esp. one involving making a decision between two opposing plans of action.Many manufacturers have to walk a tightrope between pricing their goods too high and not selling them, and pricing them low and losing money.