0 a sports event in which athletes compete in five different sports -- pentatlón moderno
1 a competition in the Olympic games etc which consists of contests in swimming, cross-country riding and running, fencing, and pistol-shooting. -- pentatlón
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.