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
In summer the roads roil with bicycles and mopeds and minicars and joggers and
The merger wave is continuing to roil key industries.
The announcement is sure to roil an already bubbling controversy over the value
  of that screening.
Internal temperature differences would not have been great enough to roil its
  liquid outer core and drive the magnetic dynamo.
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