/royl/ , v.t.
1. to render (water, wine, etc.) turbid by stirring up sediment.
2. to disturb or disquiet; irritate; vex: to be roiled by a delay.
v.i.
3. to move or proceed turbulently.
[ 1580-90; orig. uncert. ]
Syn. 2. annoy, fret, ruffle, exasperate, provoke, rile.