The Collaborative International Dictionary of English v.0.48:

Aston \As*ton"\, Astone \As*tone"\, v. t. [imp. & p. p.
   Astoned, Astond, or Astound.] [See Astonish.]
   To stun; to astonish; to stupefy. [Obs.] --Chaucer.
   [1913 Webster]