Synonyms: Diehard, Will to survive, Thick skin
The character is almost impossible to kill. He has survived blows that would be deadly to anyone but him.
In the limit of the humanly possible (decapitation, drowning, open artery etc ...) the character can not be killed by a physical injury. The most extreme damage will give him a lasting handicap at worst.
Depending on the blows received, however, it is possible that he faint or needs a long period of recovery.
In case of exposure to disease or poison, roll a die six.