0 (of a person’s conduct) not according to the (usually moral) standards required in his profession -- neprofesionální
1 (of a piece of work etc) not done with the skill of a trained person -- neodborný
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.
Můžeme to dokončit krok za krokem, ať je cesta jakkoli dlouhá, a nelze ji dokončit, ať je cesta jakkoli krátká, pokud si ani neoznačíte svou stopu.