from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To make (a liquid) muddy or cloudy by stirring up sediment.
- transitive v. To displease or disturb; vex: My roommate's off-putting habits began to roil me.
- intransitive v. To be in a state of turbulence or agitation.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To render turbid by stirring up the dregs or sediment of
- v. To annoy; to make someone angry.
- v. To bubble, seethe.
- v. To wander; to roam.
- v. To romp.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To render turbid by stirring up the dregs or sediment of; , in casks or bottles; to roil a spring.
- transitive v. To disturb, as the temper; to ruffle the temper of; to rouse the passion of resentment in; to perplex.
- intransitive v. To wander; to roam.
- intransitive v. To romp.
from The Century Dictionary and Cyclopedia
- To run; wander; roll; rove.
- To render turbid by stirring up the dregs or sediment: as, to roil wine, cider, or other liquor in casks or bottles.
- To excite to some degree of anger; annoy; vex: now more commonly, in colloquial use, rile.
- To perplex.
- To salt (fish) by means of a roiler.
- n. A Flemish horse.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. make turbid by stirring up the sediments of
- v. be agitated
Origin unknown.(American Heritage® Dictionary of the English Language, Fourth Edition)
Possibly from French Middle French rouiller ("to rust, make muddy"), from Old French rouil ("mud, rust"), from Vulgar Latin *robicula, from Latin robigo ("rust, blight") (Wiktionary)