roil

UK: /rɔɪl/ US: /rɔɪl/ ,(roil)

WordReference Random House Learner's Dictionary of American English © 2025

roil /rɔɪl/   v. [~ + object]

1. to disturb (a fluid) by stirring:
   wind roiling the water.
2. to disturb or irritate:
   Her whining roiled everyone who met her.

WordReference Random House Unabridged Dictionary of American English © 2025

roil  (roil), 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.

• origin, originally uncertain 1580–90

Synonyms

• 2. annoy, fret, ruffle, exasperate, provoke, rile.

Collins Concise English Dictionary © HarperCollins Publishers::

roil / rɔɪl/ verb

1. (transitive) to make (a liquid) cloudy or turbid by stirring up dregs or sediment
2. (intransitive) (esp of a liquid) to be agitated or disturbed
3. (intransitive) to be noisy or boisterous
4. (transitive)
   another word (now rare) for rile1

Etymology: 16th Century: of unknown origin; compare rile