The guisarme is a curving blade that bends back far enough to form a hook. A guisarme has reach. You can strike opponents 10 feet away with it, but you can't use it against an adjacent foe. You can also use it to make trip attacks. If you are tripped during your own trip attempt, you can drop the guisarme to avoid being tripped.
Martial Weapon - Melee
Two-handed weapon. This weapon has reach; you can use it to strike foes 10 feet away, but not adjacent foes. You can use this weapon to make trip attacks. If you are tripped during the attempt, you may drop the weapon to avoid being tripped in return.