Brawl
Brawl in ArM5 is a General Ability. It is used when fighting unarmed as well as with some weapons, but can also be used even while armed with other weapons in order to dodge attacks. Thus, a wizard holding a quarterstaff would normally use his Great Weapon Defense to parry attacks, but can also use his Brawl (Dodge) Defense to dodge attacks that cannot be parried (such as a dragon's bite, say, or a speeding arrow) or simply dodge in lieu of parrying.
Brawl is also one of the Abilities that characters can acquire in childhood. Many player character magi have low Brawl scores, with a specialty in dodging, retained from childhood, as a "cheap" way to offer the magus a bit more protection.