Hinder

Creative things you do to fuck with your opponent in combat, making him lose his cool, guard or balance, getting him Distracted or Vulnerable.
You can only use one type of Hinder maneuver with a single foe once, after that, you become predictable.
Most Hinder actions involve spending 1 action point, unless stated otherwise, or if the GM says otherwise.

• Intimidate - Credible threats or a murderous stare... greater foes cannot be intimidated. Charisma & Intimidation v/s Will & Control. -> Distracted.
• Spitting - Spitting your enemy in the eyes... See Spitting -> Distracted.
• Kick in the nuts - Kick or knee to the balls... Agility & Unarmed v/s Agility & Unarmed. -> Vulnerable.
• Taunt - Not any insult, one that really hurts an humiliates him... Manipulation & Deceit v/s Will & Control -> Distracted or Vulnerable, depends on the foe.
• Feint - An attack that's not such, but a mere distraction, Agility & Whatever combat skill is relevant to your weapon v/s Smarts & whatever combat skill is relevant for your enemy. -> Vulnerable.

Stuff you can do to enemies who are not engaging you directly in combat, but rather another character:

• Tripping - Trying to make an enemy fall, you cannot do this against an enemy who has engaged you in combat, but is rather targeting another character, Agility & Unarmed or Strength & Polearm v/s Agility & Unarmed -> Vulnerable.
• Screening - Involves putting yourself between him and his target very swiftly, Agility & Athletics v/s Perception & whatever combat skill is relevant to your enemy. This can only be done to an enemy that is not engaging you in combat, but rather another character. -> Vulnerable. If you fail, though, the enemy gets an Opportunity Attack on you.

These are mere examples, the limit is your creativity and whatever the GM considers reasonable.