Source : Webster's Revised Unabridged Dictionary (1913)

Debilitate \De*bil"i*tate\, v. t. [imp. & p. p. {Debilitated};
   p. pr. & vb. n. {Debilitating}.] [L. debilitatus, p. p. of
   debilitare to debilitate, fr. debilis. See {Debility}.]
   To impair the strength of; to weaken; to enfeeble; as, to
   debilitate the body by intemperance.

         Various ails debilitate the mind.        --Jenyns.

         The debilitated frame of Mr. Bertram was exhausted by
         this last effort.                        --Sir W.
                                                  Scott.

Source : WordNet®

debilitate
     v : make weak; "Life in the camp drained him" [syn: {enfeeble},
         {drain}]