throb (

     n 1: a deep pulsating type of pain
     2: an instance of rapid strong pulsation (of the heart); "he
        felt a throbbing in his head" [syn: throbbing, pounding]
     v 1: pulsate or pound with abnormal force; "my head is
          throbbing"; "Her heart was throbbing"
     2: expand and contract rhythmically; beat rhythmically; "The
        city pulsed with with music and excitement" [syn: pulsate,
     3: tremble convulsively [syn: shudder, shiver, thrill]