adj. 25B6; adjective
an inefficient worker : INEFFECTIVE, ineffectual, incompetent, inept, incapable, unfit, unskilful, inexpert, amateurish; disorganized, unprepared; negligent, lax, sloppy, slack, careless; informal lousy, useless.
inefficient processes : UNECONOMICAL, wasteful, unproductive, time-wasting, slow; deficient, disorganized, unsystematic.