hilled

from The Collaborative International Dictionary of English v.0.48

Hill \Hill\, v. t. [imp. & p. p. {Hilled}; p. pr. & vb. n.
   {Hilling}.]
   To surround with earth; to heap or draw earth around or upon;
   as, to hill corn.
   [1913 Webster]

         Showing them how to plant and hill it.   --Palfrey.
   [1913 Webster]