incapable -- ((followed by `of') lacking capacity or ability; "incapable of carrying a tune"; "he is incapable of understanding the matter"; "incapable of doing the work")
incapable -- (not being susceptible to or admitting of something (usually followed by `of'); "incapable of solution")
incapable -- ((followed by `of') not having the temperament or inclination for; "simply incapable of lying")
incapable, incompetent, unequal to -- (not meeting requirements; "unequal to the demands put upon him")
(Sound)
