Block
From Newerth: Savage Wiki
Basicly stops an enemy melee attack and stuns them for a short amount of time. Very important for humans. It decreases the damage you would get from the hit too. Your block is at it's best at lvl 7 and up. You can block all damage, except the damage over time from being poisoned. You cant walk/run and block at the same time.
Again, block decreases the damage taken. It does not make you take no damage at all. It can make you take less damage.