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Synonyms
ineffective
inefficient
useless
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inefficacious
- 2 dictionary results
in⋅ef⋅fi⋅ca⋅cious
/
ˌɪn
ɛf
ɪˈkeɪ
ʃəs
/
Show Spelled Pronunciation
[
in-ef-i-
key
-sh
uh
s
]
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inefficacious
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inefficacious
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inefficacious
–adjective
not able to produce the desired effect; ineffective.
Origin:
1650–60;
in-
3
+
efficacious
Related forms:
in⋅ef⋅fi⋅ca⋅cious⋅ly,
adverb
in⋅ef⋅fi⋅ca⋅cious⋅ness,
in⋅ef⋅fi⋅cac⋅i⋅ty
/
ˌɪn
ɛf
ɪˈkæs
ɪ
ti
/
Show Spelled Pronunciation
[
in-ef-i-
kas
-i-tee
]
Show IPA
,
noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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inefficacious
in·ef·fi·ca·cious
(ĭn-ěf'ĭ-kā'shəs)
adj. Not capable of producing a desired effect or result; ineffective.
in·ef'fi·ca'cious·ly
adv.
,
in·ef'fi·ca'cious·ness
n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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