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[roil] /rɔɪl/
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.
Origin of roil
1580-90; origin uncertain
Related forms
unroiled, adjective
Can be confused
roil, royal.
2. annoy, fret, ruffle, exasperate, provoke, rile. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for roiled
Contemporary Examples
Historical Examples
  • The water is not red (though it might sometimes look so when roiled by freshets,) but the whole caon is crimson and blood-stained.

    The Crest of the Continent Ernest Ingersoll
  • When we got up to the place where they had been there were the little swirls in the roiled water.

    Tales of Fishes Zane Grey
  • It roiled through the third courtyard, and the second and the first.

  • The contents of its tube were roiled to the height of the mark which was lettered "Tornado."

    Blow The Man Down Holman Day
  • "Yes, she does," said Craig with a complacence that roiled Arkwright.

British Dictionary definitions for roiled


(transitive) to make (a liquid) cloudy or turbid by stirring up dregs or sediment
(intransitive) (esp of a liquid) to be agitated or disturbed
(intransitive) (dialect) to be noisy or boisterous
(transitive) another word (now rare) for rile (sense 1)
Word Origin
C16: of unknown origin; compare rile
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for roiled



1580s, of uncertain origin, probably from Middle French rouiller "to rust, make muddy," from Old French roil "mud, muck, rust" (12c.), from Vulgar Latin *robicula, from Latin robigo "rust" (see robust). An earlier borrowing of the French verb is Middle English roil "to roam or rove about" (early 14c.). Related: Roiled; roiling.

Online Etymology Dictionary, © 2010 Douglas Harper
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