Sentinel

General Feat (Prerequisites: Level 4+, Strength 13+ or Dexterity 13+)

Ability Score Increase. Increase your Strength or Dexterity score by 1, to a maximum of 20.

You gain the following benefits.

Guardian.

Immediately after a creature within 5 feet of you takes the Disengage action or hits a target other than you with an attack, you can make an Opportunity Attack against that creature.

Halt.

When you hit a creature with an Opportunity Attack, the creature's Speed becomes 0 for the rest of the current turn.

Source: PHB'24, page 207