0 a circular place where roads meet and where cars drive around until they arrive at the road that they want to turn into -- glorieta, rotonda
1 a circular road with other roads leading onto it and off it -- rotonda [ feminine, singular ]
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Podemos completarlo paso a paso, por muy largo que sea el camino, y no se puede completar, por corto que sea el camino, si ni siquiera marcas tu huella.