Roil, v. i. 1. To wander; to roam. [Obs.]

2. To romp. [Prov. Eng.] Halliwell.

Roil (?), v. t. [imp. & p. p. Roiled; p. pr. & vb. n. Roiling.] [Cf. OE. roilen to wander; possibly fr. OF. roeler to roll, equiv. to F. rouler. See Roll, v., and cf. Rile.] 1. To render turbid by stirring up the dregs or sediment of; as, to roil wine, cider, etc. , in casks or bottles; to roil a spring.

2. To disturb, as the temper; to ruffle the temper of; to rouse the passion of resentment in; to perplex.

That his friends should believe it, was what roiled him [Judge Jeffreys] exceedingly.
R. North.

☞ Provincial in England and colloquial in the United States. A commoner, but less approved, form is rile.