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See more synonyms for roil on Thesaurus.com
verb (used with object)
  1. to render (water, wine, etc.) turbid by stirring up sediment.
  2. to disturb or disquiet; irritate; vex: to be roiled by a delay.
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verb (used without object)
  1. to move or proceed turbulently.
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Origin of roil

First recorded in 1580–90; origin uncertain
Related formsun·roiled, adjective
Can be confusedroil royal

Synonyms for roil

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for roils

rile, stir, muddy, disturb, anger, annoy, foul, agitate, vex, displease, bother, disquiet

Examples from the Web for roils

Historical Examples of roils

  • Add sufficient Graham flour to make a rather stiff dough, knead thoroughly, shape into roils, and bake.

    Science in the Kitchen.

    Mrs. E. E. Kellogg

  • The heat of the oven should be somewhat greater for roils and biscuit than for bread.

    Science in the Kitchen.

    Mrs. E. E. Kellogg

British Dictionary definitions for roils


  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. (intr) dialect to be noisy or boisterous
  4. (tr) another word (now rare) for rile (def. 1)
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Word Origin for roil

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

Word Origin and History for roils



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.

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Online Etymology Dictionary, © 2010 Douglas Harper