follow Dictionary.com

11 Trending Words of 2014

inefficacious

[in-ef-i-key-shuh s] /ˌɪn ɛf ɪˈkeɪ ʃəs/
adjective
1.
not able to produce the desired effect; ineffective.
Origin
1650-1660
1650-60; in-3 + efficacious
Related forms
inefficaciously, adverb
inefficaciousness, inefficacity
[in-ef-i-kas-i-tee] /ˌɪn ɛf ɪˈkæs ɪ ti/ (Show IPA),
noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for inefficaciousness

inefficacious

/ˌɪnɛfɪˈkeɪʃəs/
adjective
1.
failing to produce the desired effect
Derived Forms
inefficaciously, adverb
inefficacy (ɪnˈɛfɪkəsɪ), inefficaciousness, inefficacity (ˌɪnɛfɪˈkæsɪtɪ) noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for inefficaciousness

inefficacious

adj.

1650s, from in- (1) "not, opposite of" + efficacious. Related: Inefficaciously; inefficaciousness (1640s).

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of the Day

Difficulty index for inefficacious

Few English speakers likely know this word

Word Value for inefficaciousness

0
32
Scrabble Words With Friends