Not able; not having sufficient strength, means, knowledge, skill, or the like; impotent; weak; helpless; incapable; - now usually followed by an infinitive or an adverbial phrase; as, unable for work; unable to bear fatigue.
Lacking ability; unable.
To render unable or incapable; to destroy the force, vigor, or power of action of; to deprive of competent physical or intellectual power; to incapacitate; to disqualify; to make incompetent or unfit for service; to impair.
To deprive of legal right or qualification; to render legally incapable.
To deprive of that which gives value or estimation; to declare lacking in competency; to disparage; to undervalue.