what is affinity in monster hunter rise

In Monster Hunter Rise, affinity is a stat associated with weapons that determines how likely a weapon is to land a critical attack. It is synonymous with critical chance and can be either positive or negative. If a weapon has a positive affinity, it means that there is a chance to perform extra damage with a critical hit. On the other hand, if a weapon has a negative affinity, it means that there is a chance to deliver a weak attack. Each weapon has an affinity stat where the chance to perform extra damage is displayed as a percentage. When a critical hit is landed, a red slash through the damage number will appear. Affinity is a multiplicative bonus to damage, and 100% affinity with critical boost 3 is a 40% extra damage. The easiest way to raise affinity in Monster Hunter Rise is by getting a weapon that already has positive affinity and then equipping it.