Blind
Burn
Charm
Fear
Sleep
Slow
Stun
A unit that is stunned loses control and is unable to control its movement, declare attacks, cast Abilities, or use Potions.
Stun is most commonly associated with 
Light Damage.
The only way to remove Stun is by using 
Cleanse or waiting. The duration of Stun is usually fairly short,
as it is such a debilitating effect. 
Tenacity shortens the duration of Stun.