\In*ca"pa*ble\, a. [Pref. in- not + capable: cf. F.
incapable, L. incapabilis incomprehensible.]
1. Wanting in ability or qualification for the purpose or end
   in view; not large enough to contain or hold; deficient in
   physical strength, mental or moral power, etc.; not
   capable; as, incapable of holding a certain quantity of
   liquid; incapable of endurance, of comprehension, of
   perseverance, of reform, etc.
2. Not capable of being brought to do or perform, because
   morally strong or well disposed; -- used with reference to
   some evil; as, incapable of wrong, dishonesty, or
   falsehood.
3. Not in a state to receive; not receptive; not susceptible;
   not able to admit; as, incapable of pain, or pleasure;
   incapable of stain or injury.
4. (Law) Unqualified or disqualified, in a legal sense; as, a
   man under thirty-five years of age is incapable of holding
   the office of president of the United States; a person
   convicted on impeachment is thereby made incapable of
   holding an office of profit or honor under the government.
5. (Mil.) As a term of disgrace, sometimes annexed to a
   sentence when an officer has been cashiered and rendered
   incapable of serving his country.
Note: Incapable is often used elliptically.
            Is not your father grown incapable of reasonable
            affairs?                           --Shak.
Syn: Incompetent; unfit; unable; insufficient; inadequate;
     deficient; disqualified. See {Incompetent}.

\In*ca"pa*ble\, n.
One who is morally or mentally weak or inefficient; an
imbecile; a simpleton.