0 the person or thing that is the centre/center of interest or activity -- centrum
1 the point at which light rays meet after they have passed through a lens or have been reflected by a mirror. -- ohnisko
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.