1 not able to happen or be done -- imposible [ masculine-feminine ]
2 difficult to cope with or deal with -- imposible [ masculine-feminine ]
an impossible situation una situación imposible
He’s impossible when he gets into one of his moods. Es insoportable cuando entra en uno de sus estados de ánimo.
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.