inefficacious

English Thesaurus

1. lacking the power to produce a desired effect (adj.all)

also	:	ineffective, ineffectual, uneffective,
definition	:	not producing an intended effect (adj.all)

attribute	:	efficaciousness, efficacy,
definition	:	capacity or power to produce a desired effect (noun.attribute)

antonym	:	efficacious,
definition	:	marked by qualities giving the power to produce an intended effect (adj.all)

derivation	:	inefficaciousness, inefficacy,
definition	:	a lack of efficacy (noun.attribute)

antonym	:	efficacious,
definition	:	marked by qualities giving the power to produce an intended effect (adj.all)

derivation	:	inefficaciousness, inefficacy,
definition	:	a lack of efficacy (noun.attribute)