Antonym: effective. Similar words: effective, effectively, cost effective, effectiveness, in effect, ineffectual, defective, effect. Meaning: [‚ɪnɪ'fektɪv] 
adj. 1. not producing an intended effect 2. lacking in power or forcefulness 3. lacking the ability or skill to perform effectively; inadequate.
adj. 1. not producing an intended effect 2. lacking in power or forcefulness 3. lacking the ability or skill to perform effectively; inadequate. 
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1. These policies have proved ineffective.
2. The chemical was almost totally ineffective in killing the weeds.
3. This kind of training is ineffective, and wasteful of scarce resources.
4. They made an ineffective attempt to get the rules changed.
5. The court is ineffective because it lacks the necessary enforcement machinery.
6. Various drugs have proved ineffective against the virus.
7. The Chancellor's countermeasures against inflation have been completely ineffective.
8. The contract was rendered ineffective by this careless wording.
9. Economic reform will continue to be painful and ineffective.
10. The law proved ineffective in dealing with the problem.
11. These weapons are totally ineffective against tanks.
12. The system was not only complicated but also ineffective.
13. The research will help governments to weed out ineffective aid schemes.
14. The dictionary is blemished by those long ineffective example sentences.
15. The technique is at best ineffective and at worst dangerous.
15. Wish you can benefit from our online sentence dictionary and make progress day by day!
16. The army has proved ineffective in protecting the civilian population.
17. Buller's actions have been rightly criticized as ineffective.
18. Their cannonade, although impressive, was quite ineffective.
19. They lost the game partly because of ineffective passing.
20. If renal function is severely impaired, acetazolamide is ineffective.
21. The new drug was ineffective.
22. She felt so ineffective, she could have cried.
23. Action that was demonstrably ineffective would do no good to Peres's electoral prospects.
24. Furthermore, they claim that any such interference is completely ineffective.
25. Some dentists are convinced that the addition of fluoride in water is ineffective as a prophylactic treatment.
26. It would be tragic if World Bank assistance is used to pursue the ineffective treatment regimen.
27. The unions had almost no influence on the factory floor and were ineffective in collective bargaining.
28. Myth-3: New disk drive technology that doesn't improve seek time can be dismissed as ineffective.
29. To present such stark choices on one's own, rather than in a formal Intervention, is commonly ineffective.
30. Table 5-1 describes briefly one of the many different ways each style might be perceived as effective or ineffective by others.
More similar words: effective, effectively, cost effective, effectiveness, in effect, ineffectual, defective, effect, effected, take effect, side effect, ripple effect, coriolis effect, greenhouse effect, affection, the greenhouse effect, affectional, affectionate, affectionately, elective, objective, subjective, adjective, invective, detective, directive, protective, corrective, collective, perspective.