To render turbid by stirring up the dregs or sediment of; as, to roil wine, cider, etc. , in casks or bottles; to roil a spring.
- To make (a liquid) muddy or cloudy by stirring up sediment.
- To displease or disturb; vex: My roommate's off-putting habits began to roil me.
- To be in a state of turbulence or agitation.