verb (used with object)
to render (water, wine, etc.) turbid by stirring up sediment.
to disturb or disquiet; irritate; vex: to be roiled by a delay.
verb (used without object)
to move or proceed turbulently.

1580–90; origin uncertain

unroiled, adjective

roil, royal.

2. annoy, fret, ruffle, exasperate, provoke, rile. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
roil (rɔɪl)
1.  (tr) to make (a liquid) cloudy or turbid by stirring up dregs or sediment
2.  (intr) (esp of a liquid) to be agitated or disturbed
3.  dialect (intr) to be noisy or boisterous
4.  (tr) another word (now rare) for rile
[C16: of unknown origin; compare rile]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1590, probably from M.Fr. rouiller "to rust, make muddy," from O.Fr. rouil "mud, rust," from V.L. *robicula, from L. robigo "rust" (see robust). M.E. roil meant "to roam or rove about."
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Coffee so made should be served from range, as much motion causes it to become
After centuries of political stability, a series of military coups roiled the
Adelies hop from one block to another and enjoy the action as the blocks are
  roiled by the water.
Today astronomers recognize the medium as a protean atmosphere roiled by
  supernova explosions.
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