not able to produce the desired effect; ineffective.
- in·ef·fi·ca·cious·ly, adverb
- in·ef·fi·ca·cious·ness, in·ef·fi·cac·i·ty [in-ef-i-kas-i-tee], /ˌɪn ɛf ɪˈkæs ɪ ti/, noun
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How to use inefficacious in a sentence
All attempts at cure proving inefficacious, he had at length to settle down once more in London.Karl Marx | Achille Loria
The next was in 1641, when Charles I. returned from his imprudent and inefficacious journey into Scotland.
I therefore once more directed squill, with decoction of seneka and sal sodæ; but it was inefficacious.An Account of the Foxglove and some of its Medical Uses | William Withering
The trials were made only on small animals, but in each case the alleged remedy proved inefficacious.The Romance of Natural History, Second Series | Philip Henry Gosse
Their united efforts were vain, however; and even the remedies suggested by Apollo, god of medicine, proved inefficacious.Myths of Greece and Rome | H. A. Guerber
British Dictionary definitions for inefficacious
failing to produce the desired effect
- inefficaciously, adverb
- inefficacy (ɪnˈɛfɪkəsɪ), inefficaciousness or 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