Grapple

Grapple a target, attempting to restrain them.

• You can use the Attack action to make a special melee attack, a grapple. If you're able to make multiple attacks with the Attack action, this attack replaces one of them.
• The target of your grapple must be no more than one size larger than you, and it must be within your reach.
• Using at least one free hand, you try to seize the target by making a grapple check, a Strength (Athletics) check contested by the target's Strength (Athletics) or Dexterity (Acrobatics) check (the target chooses the ability to use).
• If you succeed, you subject the target to the grappled condition (its speed is set to 0).

Some monsters have special grapple attacks which don't require an additional ability check to determine whether the grapple succeeds.