A rope or wire stretched high above the ground that performers balance on; also used figuratively to mean a precarious situation where you must be very careful.
Compound of 'tight' (pulled taut) and 'rope.' The term emerged in the 1600s as circus entertainment grew popular and performers needed terminology for their specialized equipment.
Tightrope walking teaches a counterintuitive physics lesson: you actually need to lean forward and make micro-corrections constantly to stay balanced—completely still would make you fall. Modern research shows our brains use the same principle for all balance, which is why even changing your shoes feels weird.
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