Source : Webster's Revised Unabridged Dictionary (1913)

Incapacitate \In`ca*pac"i*tate\, v. t. [imp. & p. p.
   {Incapacitated}; p. pr. & vb. n. {Incapacitating}.] [Pref.
   in- not + capacitate.]
   1. To deprive of capacity or natural power; to disable; to
      render incapable or unfit; to disqualify; as, his age
      incapacitated him for war.

   2. (Law) To deprive of legal or constitutional requisites, or
      of ability or competency for the performance of certain
      civil acts; to disqualify.

            It absolutely incapacitated them from holding rank,
            office, function, or property.        --Milman.

Source : WordNet®

incapacitating
     adj : that cripples or disables or incapacitates; "a crippling
           injury" [syn: {crippling}, {disabling}]