cover

Attempt to cover the retreat of other characters
Usage:
cover <character>[,<character2>,<character3>...]
cover/stop [<character>, <character2>...]

Cover has your character declare your intent to remain behind and fight
others while you cover the retreat of one or more characters. Covering
a retreat does not take your action for the round, but prevents you
from fleeing yourself and imposes a difficulty penalty on attacks due
to the distraction.