inefficacious

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in·ef·fi·ca·cious

 (ĭn-ĕf′ĭ-kā′shəs)
adj.
Not capable of producing a desired effect or result; ineffective.

in·ef′fi·ca′cious·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

inefficacious

(ˌɪnɛfɪˈkeɪʃəs)
adj
failing to produce the desired effect
ˌineffiˈcaciously adv
inefficacy, ˌineffiˈcaciousness, inefficacity n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.inefficacious - lacking the power to produce a desired effect; "laws that are inefficacious in stopping crime"
ineffective, ineffectual, uneffective - not producing an intended effect; "an ineffective teacher"; "ineffective legislation"
efficacious - marked by qualities giving the power to produce an intended effect; "written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley; "the medicine is efficacious in stopping a cough"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

inefficacious

adjective
Not having the desired effect:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Translations

inefficacious

[ˌɪnefɪˈkeɪʃəs] ADJ (frm) → ineficaz
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

inefficacious

adjunwirksam, wirkungslos, ohne Wirkung; policyerfolglos, fruchtlos
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in periodicals archive ?
"Communists are using as propaganda the inefficacies of government to advance their aspiration of toppling democracy.
Despite widespread criticisms about rampant corruption and inefficacies in his government, Mr.