Source : Webster's Revised Unabridged Dictionary (1913)

Rattle \Rat"tle\, v. i. [imp. & p. p. {Rattled}; p. pr. & vb. n.
   {Rattling}.] [Akin to D. ratelen, G. rasseln, AS. hr[ae]tele
   a rattle, in hr[ae]telwyrt rattlewort; cf. Gr. ? to swing,
   wave. Cf. {Rail} a bird.]
   1. To make a quick succession of sharp, inharmonious noises,
      as by the collision of hard and not very sonorous bodies
      shaken together; to clatter.

            And the rude hail in rattling tempest forms.
                                                  --Addison.

            'T was but the wind, Or the car rattling o'er the
            stony street.                         --Byron.

Source : WordNet®

rattled
     adj : thrown into a state of agitated confusion; (`rattled' is an
           informal term) [syn: {flustered}, {hot and bothered(p)},
            {perturbed}]