Word of the Week by Ms Debbie | Dec 12, 2016 | Word of the Week Roil verb (used with object) 1. to render (water, wine, etc.) turbid by stirring up sediment. 2. to disturb or disquiet; irritate; vex: as in: “to be roiled by a delay”. or “roiling masses of voters” verb (used without object) 3. to move or proceed turbulently.