ROIL, verb transitive 1. To render turbid by stirring up the dregs or sediment; as, to roil wine, cider or other liquor in casks or bottles. 2. To excite some degree of anger; to disturb the passion of resentment. [These senses are in common use in New England, and locally in England.] 3. To perplex. [Local in England.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI