The Collaborative International Dictionary of English v.0.48:

Ungrave \Ungrave\
   See grave.

The Collaborative International Dictionary of English v.0.48:

Ungrave \Un*grave"\, v. t. [1st pref. un- + grave.]
   To raise or remove from the grave; to disinter; to untomb; to
   exhume. [Obs.] --Fuller.
   [1913 Webster]