The Collaborative International Dictionary of English v.0.48:

Deprostrate \De*pros"trate\, a.
   Fully prostrate; humble; low; rude. [Obs.]
   [1913 Webster]

         How may weak mortal ever hope to file
         His unsmooth tongue, and his deprostrate style. --G.
                                                  Fletcher.
   [1913 Webster]