Status Effects
There is currently a Status effect called Bleeding. Its inflicted via Bow with a 10% Chance to add the Status Debuff to the enemy.
Knockback
There are various ways to Inflict Knockback.
Normal Bow Shot and Multi Shot can Inflict Knockback.
Hammer
Stamina/Mana
Like you the Enemys have also Stamina/Mana too.
Its Displayed right under the their Health Bar. They recharge them with normal hits and after time like the Player.