Wounds
Your character starts the game hale and healthy. But you're likely to encounter threats at some point and risk becoming wounded. Wounds can come from such varied sources as the attack of a predatory beast, a fall from a great height, or a supernatural effect like an explosion of magical fire. Anything that hurts you gives you a wound.
Wounds come in three severities: minor, moderate, and major.
A core character can take up to three minor wounds, three moderate wounds, and three major wounds. When you're wounded, record the wound on your character sheet—there's a box for each of them. Each kind of wound has a different effect on your character.
Your character type usually increases the number of wounds you can take.
Minor Wounds: These are nicks, scratches, bruises, and other inconsequential injuries that no longer hurt after a few hours. Individual minor wounds don't negatively affect your character in any way. When you're out of minor wounds, any new minor wounds you take become moderate wounds.
Moderate Wounds: These are open cuts, weapon grazes, sprains, minor fractures, and other injuries that no longer hurt after a few days. When you take your last moderate wound, all of your actions are hindered, and any new moderate wounds you take become major wounds.
Major Wounds: These are fractures, large open cuts, gunshot wounds, and other significant injuries that generally take anywhere from days to weeks to recover from. Each major wound you take hinders all of your actions. When you take your last major wound, you die.
Sometimes a rule refers to the different wound severities as steps, as in "You reduce the severity of a wound by one step." Don't confuse this with easing or hindering a task's difficulty by a step.