Source : Webster's Revised Unabridged Dictionary (1913)

Depredate \Dep"re*date\, v. t. [imp. & p. p. {Depredated}; p.
   pr. & vb. n. {Depredating}.] [L. depraedatus, p. p. of
   depraedari to plunder; de- + praedari to plunder, praeda
   plunder, prey. See {Prey}.]
   To subject to plunder and pillage; to despoil; to lay waste;
   to prey upon.

         It makes the substance of the body . . . less apt to be
         consumed and depredated by the spirits.  --Bacon.

Depredate \Dep"re*date\, v. i.
   To take plunder or prey; to commit waste; as, the troops
   depredated on the country.