| Unable (a.) 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. Thesaurus Entries ill-qualified, impotent, inadequate, incapable, incapable of, incompetent, ineffective, ineffectual, inefficient, inept, inferior, maladjusted, not equal to, not up to, powerless, unable to, unadapted, unadjusted, unendowed, unequipped, unfit, unfitted, ungifted, unqualified, untalented |