roil /ˈɹɔɪl/ verb4 •To render turbid by stirring up the dregs or sediment of.to roil wine, cider, etc, in casks or bottlesdust storms roiling the skies •To bubble, seethe. •To annoy; to make angry; to throw into discord.That his friends should believe it, was what roiled him exceedingly. — 1890 •To romp or tumble.The finale was a romp in which the entire troupe burst out of the bouldering cave and roiled along the walls. — 1991 formsroiled · roiling · roils