adj. not producing an intended effect; "an ineffective teacher"; "ineffective legislation"

adj. producing no result or effect; "a futile effort"; "the therapy was ineffectual"; "an otiose undertaking"; "an unavailing attempt"

adj. unproductive of success; "a fruitless search"; "futile years after her artistic peak"; "a sleeveless errand"; "a vain attempt"

adj. not practical; not workable or not given to practical matters; "refloating the ship proved impractical because of the expense"; "he is intelligent but too impractical for commercial work"; "an impractical solution"

adj. existing only in the mind; separated from embodiment; "abstract words like `truth' and `justice'"

adj. lacking in usefulness or value; "a worthless idler"

adj. without offspring; "in some societies a childless woman is rejected by her tribesmen"

adj. not in action or at work; "an idle laborer"; "idle drifters"; "the idle rich"; "an idle mind"

adj. lacking the power to produce a desired effect; "laws that are inefficacious in stopping crime"

adj. not producing desired results; wasteful; "an inefficient campaign against drugs"; "outdated and inefficient design and methods"

adj. lacking power

adj. having no beneficial use or incapable of functioning usefully; "a kitchen full of useless gadgets"; "she is useless in an emergency"

adj. producing or capable of producing an intended result or having a striking effect; "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law"

adj. being of use or service; "the girl felt motherly and useful"; "a useful job"; "a useful member of society"

adj. (usually followed by `of') having capacity or ability; "capable of winning"; "capable of hard work"; "capable of walking on two feet"

adj. have the skills and qualifications to do things well; "able teachers"; "a capable administrator"; "children as young as 14 can be extremely capable and dependable"