“Unable to act; stacks duration.
— In-game description
Being stunned prevents all movement and actions, except for activating special skills that have no activation time, such as Signet of Shadows or Shocking Aura. Skills which have the ability to break stun will return the user's freedom to act. Despite its in-game description, the duration of stun is generally believed to not stack.
The Stun effect is shown as swirling white lines and dots around the head.
 Stun break
- Primary article: Stun break
Skills which break stun will cancel the effects of stun as well as most other control effects.
 Skills that stun
 Weapon skills that stun
- Shield Bash
- Static Shield
- Concussion Shot (If Flanking)
- Hilt Bash (If Flanking)
- Pistol Whip
- Shocking Aura
- Static Field
- Magic Bullet
 Elite skills that stun
 Underwater weapon skills that stun
 Utility skills that stun
 Profession mechanics that stun
 Skills with special conditions that stun
 Environmental weapon skills that stun
 Traits that benefit from stuns on enemies
- Unsuspecting Foe (50% crit chance versus stunned enemies)
- Grounded (+20% damage to stunned foes)
- Wastrel's Punishment (+5% increased damage to inactive foes)
 Traits that cause stun
 Traits that reduce the effects of stun
- Shrug It Off (breaks stun when you have more than one condition)
- Earth's Embrace (breaks stun upon reaching 50% health)
 Traits that increase the effects of stun
- Moment of Clarity - Gain an attack of opportunity for you and your pet on interrupting a foe. This effect can only trigger once every 5 seconds. Daze and stun durations you inflict are also increased by 50%.
 Upgrade components that affect stun on foes
- Sigil of Paralyzation (increases duration)
- Sigil of Impact (+10% damage to stunned or knocked-down foes)
 Upgrade components that reduce duration of stun on self
- Major Rune of Melandru; -7% stun duration.
- Superior Rune of Melandru (rank 4); -10% stun duration.
- Superior Rune of Melandru (rank 6); -15% (= -25%) stun duration.
 Upgrade components that stun self
 Related consumables
 Consumables that decrease stun duration
- Cup of Potato Fries
- Mashed Potato
- Turnip Casserole
- Bowl of Mashed Yams
- Bowl of Spiced Mashed Yams
- Roasted Rutabaga
- Roasted Parsnip
- Bowl of Roasted Lotus Root
 Consumables that reduce damage received while stunned
- Cheese Triangle
- Slice of Cinnamon Toast
- Slice of Garlic Bread
- Loaf of Rosemary Bread
- Slice of Spiced Bread
- Loaf of Tarragon Bread
- Loaf of Saffron Bread