0 to press your hand or a cloth on a surface and move it backwards and forwards -- frotar, restregar
1 to move sth backward and forward over the surface of sth -- frotar
3 an act of rubbing -- masaje [ masculine, 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.