not having the ability, qualification, or strength for (a specified act or function).
b.
not open to; not susceptible to or admitting: These materials are incapable of exact measurement.
c.
legally unqualified for.
Origin: 1585–95; < Late Latin incapābilis.See in-3, capable
Related forms
in·ca·pa·bil·i·ty, in·ca·pa·ble·ness, noun
in·ca·pa·bly, adverb
Synonyms 1.Incapable,incompetent,inefficient,unable are applied to a person or thing that is lacking in ability, preparation, or power for whatever is to be done. Incapable usually means inherently lacking in ability or power: incapable of appreciating music; a bridge incapable of carrying heavy loads. Incompetent, generally used only of persons, means unfit or unqualified for a particular task: incompetent as an administrator. Inefficient means wasteful in the use of effort or power: an inefficient manager; inefficient methods. Unable usually refers to a temporary condition of inability to do some specific thing: unable to relax, to go to a concert. 2. impotent, unqualified.