roil roil /ˈrɔɪl/

verb

1. Make turbid by stirring up the sediments of  ( rile [ N. American] , roil )
   make turbid by stirring up the sediments of
   
2. Be agitated  ( boil , churn , moil [ N. American] , roil )
   be agitated
    The sea was churning in the storm
   the sea was churning in the storm