Antonyms for in efficacy

Grammar : Noun

Spell : in-ef-i-kuh-see

Phonetic Transcription : ɪnˈɛf ɪ kə si

Definition of in efficacy

Origin : "want of force or virtue to produce the desired effect," 1610s, from Late Latin inefficacia, from inefficacem (nominative inefficax), from in- "not, opposite of" (see in- (1)) + efficax (see efficacy).

As in inability : noun disabling lack of talent, skill
As in inadequacy : noun shortage, defect, inability
As in incapability : noun ineffectuality
As in incapability : noun inability
As in incompetency : noun inability
As in ineffectiveness : noun ineffectuality
As in ineffectualness : noun ineffectuality
As in inefficacy : noun ineffectuality
As in powerlessness : noun inability
As in powerlessness : noun ineffectuality
As in uselessness : noun ineffectuality
As in disappointment : noun saddening situation; letdown

Synonyms for in efficacy

Based on : Thesaurus.com - Gutenberg.org - Dictionary.com - Random House Unabridged Dictionary, © Random House, Inc. 2019