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®

debilitated
     adj 1: lacking strength or vigor [syn: {adynamic}, {asthenic}, {enervated}]
     2: weak and feeble; "I'm feeling seedy today" [syn: {enfeebled},
         {infirm}, {seedy}]