(third-person singular simple present roils, present participle roiling, simple past and past participle roiled)
- To render turbid by stirring up the dregs or sediment of
- To annoy; to make someone angry.
- (intransitive) To bubble, seethe.
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
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")