The Collaborative International Dictionary of English v.0.48:

Shudder \Shud"der\, v. i. [imp. & p. p. Shuddered;p. pr. & vb.
   n. Shuddering.] [OE. shoderen, schuderen; akin to LG.
   schuddern, D. schudden to shake, OS. skuddian, G. schaudern
   to shudder, sch["u]tteln to shake, sch["u]tten to pour, to
   shed, OHG. scutten, scuten, to shake.]
   To tremble or shake with fear, horrer, or aversion; to shiver
   with cold; to quake. "With shuddering horror pale." --Milton.
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         The shuddering tennant of the frigid zone. --Goldsmith.
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