inefficient Antonyms

efficient capable of skilled skilful saving rentable realistic prolific profitable proficient productive pragmatic practical potent pearl organized operative operant skillful structured successful well-planned well-ordered up and coming impactful cost-efficient cost-effective multipurpose cash crop pragmatics unstinted streamlined moneymaking utilitarian useful tuned timesaving systematic nugget neat multipotent constructive conducive competent clever capable businesslike beneficial beautiful bankable