(n.) Lacking power or energy sufficient for the desired effect; inefficacy; incapacity; as, he was discharged from his position for inefficiency.
Thesaurus Entries
disability, disablement, disqualification, imbecility, inability, inadeptness, inadequacy, inaptitude, inaptness, inattentiveness, incapability, incapacitation, incapacity, incompetence, incompetency, indexterity, ineffectiveness, ineffectuality, ineptitude, ineptness, infancy, inferiority, insufficiency, legal incapacity, maladjustment, maladroitness, mediocrity, minority, pedestrianism, rustiness, skill-lessness, thoughtlessness, unaptness, uncleverness, undeftness, undexterousness, undextrousness, unfitness, unfittedness, unintelligence, unproficiency, unschooledness, unskillfulness, untrainedness, wardship
