COMMAND HELP: GRAPPLE
Allows you to grab hold of someone, and prevent them from leaving your current location. Note that you must have at least one empty hand to grapple with. Success depends on relative strengths and sizes. Once successfully grappled, you may hold weapons in the grappling hands; however this makes it easier for the grappled foe to escape your grip. Stop grappling will stop your attempts to prevent them from leaving.
Finally, grappling is an aggressive act.