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in·ef·fi·ca·cious
 inefficacious
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- pronunciation:
- In
e
f
keI
shihs
| part of speech: |
adjective |
| definition: |
unable to produce the desired result; useless; ineffective.
- antonyms:
- efficacious
- similar words:
- nugatory, useless, vain
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| derivations: |
inefficaciously (adv.), inefficaciousness (n.), inefficacity (n.) |
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