Weakness is a negative Status Effect, which temporarily decreases the amount of damage an attacker deals to a target from melee attacks. The higher the level of the effect, the less damage is dealt to the target.
Like all status effects, it can be removed by drinking Milk.
This status effect can be gained from two sources:
The Strength status effect produces the exact opposite effect of weakness. Strength increases the amount of damage dealt to a target when the user is using melee attacks. The higher the level of this effect, the more damage is dealt to the target.