0 a very hard, dark grey substance, usually in the form of a powder, that is used to smooth or shape things -- esmeril
1 a very hard kind of mineral, used as a powder etc for polishing. -- esmeril
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.