Resistant
From AmtWiki
From the Rulebook.
The player is unaffected by the next effect of a given type.
Players must announce ‘resistant’ upon triggering.
Melee: Not affected by the next strike from a melee weapon. No effect on projectiles.
Wounds: Does not receive the next Wound that would otherwise be inflicted.
School: Immune to the next Magic or Ability from the given School.
The primary distinction between Resistant and Immune is that Resistant only works one time. Immune continues working until it is lost/dispelled etc.