You have been hit by a force that may push you backwards.
Knockback is a tagged effect. Sources apply it as Knockback X, where X is the potency — the number of tiles of forced movement on a failed resist. For example, Knockback 2 has potency 2.
You are immune to this effect if you are Prone.
Roll an 🏊 END + 🏕 Survival Test
Guaranteed Minimum
By default, a successful resist completely negates Knockback. Some weapons or abilities may specify a guaranteed minimum in their description (e.g. “Knockback 3 — minimum 1 tile even on success”). When present, that minimum overrides the standard “no movement on success” outcome. The Knockback effect itself does not impose a minimum.