The Collaborative International Dictionary of English v.0.48:

Quake \Quake\, v. i. [imp. & p. p. Quaked; p. pr. & vb. n.
   Quaking.] [AS. cwacian; cf. G. quackeln. Cf. Quagmire.]
   1. To be agitated with quick, short motions continually
      repeated; to shake with fear, cold, etc.; to shudder; to
      tremble. "Quaking for dread." --Chaucer.
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            She stood quaking like the partridge on which the
            hawk is ready to seize.               --Sir P.
                                                  Sidney.
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   2. To shake, vibrate, or quiver, either from not being solid,
      as soft, wet land, or from violent convulsion of any kind;
      as, the earth quakes; the mountains quake. " Over quaking
      bogs." --Macaulay.
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