The Collaborative International Dictionary of English v.0.48:

Roil \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.
      [1913 Webster]

   2. To disturb, as the temper; to ruffle the temper of; to
      rouse the passion of resentment in; to perplex.
      [1913 Webster]

            That his friends should believe it, was what roiled
            him [Judge Jeffreys] exceedingly.     --R. North.
      [1913 Webster]

   Note: Provincial in England and colloquial in the United
         States. A commoner, but less approved, form is rile.
         [1913 Webster]

WordNet (r) 3.0 (2006):

roiled
    adj 1: aroused to impatience or anger; "made an irritated
           gesture"; "feeling nettled from the constant teasing";
           "peeved about being left out"; "felt really pissed at her
           snootiness"; "riled no end by his lies"; "roiled by the
           delay" [syn: annoyed, irritated, miffed, nettled,
           peeved, pissed, pissed off, riled, roiled,
           steamed, stung]
    2: (of a liquid) agitated vigorously; in a state of turbulence;
       "the river's roiling current"; "turbulent rapids" [syn:
       churning, roiling, roiled, roily, turbulent]

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "roiled":
   adiaphanous, aggravated, angry, annoyed, bothered, browned-off,
   bugged, burnt-up, chafed, cloudy, dark, disturbed, exasperated,
   galled, griped, grumly, impervious to light, intransparent, irked,
   irritated, miffed, nettled, obscure, opaque, peeved, piqued,
   provoked, resentful, riled, roily, ruffled, troubled, turbid,
   vexed