irritate


irritate (http://definr.com/irritate)

     v 1: cause annoyance in; disturb, esp. by minor irritations:
          "Mosquitoes buzzing in my ear really bothers me"; "It
          irritates me that she never closes the door after she
          leaves" [syn: annoy, rag, get to, bother, {get
          at}, rile, nark, nettle, gravel, vex, chafe,
           devil]
     2: cause to be in a worse state; "Aspirin irritates my stomach"
        [ant: soothe]