1. (a.) Not producing the effect intended or desired; inefficacious; as, inefficient means or measures.
2. (a.) Incapable of, or indisposed to, effective action; habitually slack or remiss; effecting little or nothing; as, inefficient workmen; an inefficient administrator.
Thesaurus Entries
artless, careless, half-assed, inadept, inapt, inattentive, incapable, incapable of, incompetent, ineffective, ineffectual, inefficacious, inept, inexpert, inferior, mediocre, pedestrian, poor, skill-less, slipshod, slovenly, thoughtless, unable, unable to, unapt, undeft, undexterous, undextrous, unendowed, unfacile, unfit, unfitted, ungifted, unintelligent, unprepared, unproficient, unqualified, unskilled, unskillful, untalented, untrained, unworkmanlike
