Shud·der v. i. [imp. & p. p. Shuddered p. pr. & vb. n. Shuddering.]  To tremble or shake with fear, horrer, or aversion; to shiver with cold; to quake. “With shuddering horror pale.”
    The shuddering tennant of the frigid zone.   --Goldsmith.
 shuddering
      adj : shaking convulsively or violently