0 the one or the other of two -- jeden nebo druhý; žádný
1 the one or the other (of two things, people etc) -- oba
He can write with either hand.
2 the one and the other (of two things, people etc); both -- oba
3 used for emphasis -- také (ne)
If you don’t go, I won’t either.
4 moreover; besides -- dokonce, navíc
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.