shudder


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

     n 1: an almost pleasurable sensation of fright; "a frisson of
          surprise shot through him" [syn: frisson, shiver, chill,
           quiver, thrill, tingle]
     2: an involuntary vibration (as if from illness or fear) [syn:
        tremor]
     v 1: shake, as from cold or fear [syn: shiver, dither]
     2: tremble convulsively [syn: shiver, throb, thrill]