#quivering__vibration__quiver  the act of vibrating
  supertype:  position_change__movement__move__motility  a change of position that does not entail a change of location; "the reflex motion of his eyebrows revealed his surprise"; "movement is a sign of life"; "an impatient move of his hand"; "gastrointestinal motility"
  subtype:  shudder__tremor  an involuntary vibration (as if from illness or fear)

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