Not capable (of doing something); unable. / Not in a state to receive; not receptive; not susceptible; not able to admit.

(dated) One who is morally or mentally weak or inefficient; an imbecile; a simpleton.

plural of incapable

The quality or state of being incapable; incapability.

In an incapable manner.

The condition of being incapable.

plural of incapability

plural of incap

(military) Any incapacitant.