The Collaborative International Dictionary of English v.0.48:

Sunder \Sun"der\, n. [See Sunder, v. t., and cf. Asunder.]
   A separation into parts; a division or severance.
   [1913 Webster]

   In sunder, into parts. "He breaketh the bow, and cutteth
      the spear in sunder." --Ps. xlvi. 9.
      [1913 Webster]