quiver
     n 1: an almost pleasurable sensation of fright; "a frisson of
          surprise shot through him" [syn: {frisson}, {shiver}, {chill},
           {shudder}, {thrill}, {tingle}]
     2: a shaky motion; "the shaking of his fingers as he lit his
        pipe" [syn: {shaking}, {shakiness}, {trembling}, {quivering},
         {vibration}, {palpitation}]
     3: case for holding arrows
     4: the act of vibrating [syn: {vibration}, {quivering}]
     v 1: shake with fast, tremulous movements; "His nostrils
          palpitated" [syn: {quake}, {palpitate}]
     2: move back and forth very rapidly; "the candle flickered"
        [syn: {flicker}, {waver}, {flitter}, {flutter}]
     3: move with or as if with a regular alternating motion; "the
        city pulsated with music and excitement" [syn: {pulsate},
        {beat}]
Source: WordNet® 2.0