shudder

Noun

• an involuntary vibration (as if from illness or fear)

• an almost pleasurable sensation of fright
  • a frisson of surprise shot through him
    

Verb

• tremble convulsively, as from fear or excitement

• shake, as from cold
  • The children are shivering--turn on the heat!
    

Related words

• Synonyms: 
  tremor , frisson , shiver , chill , quiver , thrill , tingle , throb