The term 'in one piece' is used to describe something that is INTACT, UNSCATHED, WHOLE, and seamless. It is often used to describe an object or situation that has not been damaged or disrupted in any way. INTACT means undamaged or unaltered, UNSCATHED means not harmed or injured, WHOLE means complete or entire, and seamless means without interruption or discontinuity. Together, these words describe something that is in perfect condition and has not been affected by any outside forces.