GRAPPLE

Grab a creature or wrestle with it. (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. roll: a Str (Athletics) check VS.
target's Str (Athletics) or Dex (Acrobatics) check.
If you succeed, you subject the target to the
grappled condition. The condition specifies the
things that end it, and you can release the target
whenever you like (no action required).