nettle

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

     n : any of numerous plants having stinging hairs that cause skin
         irritation on contact (especially of the genus Urtica or
         family Urticaceae)
     v 1:  goad or provoke,as by constant criticism; "He needled her
          with his sarcastic remarks" [syn: needle, goad]
     2: 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,
         irritate, rile, nark, gravel, vex, chafe, devil]