Found 2 items, similar to inefficaciousness.
English → English (WordNet) Definition: inefficaciousness inefficaciousness n : a lack of efficacy [syn: inefficacy] [ant: efficacy]
English → English (gcide) Definition: Inefficaciousness Inefficaciousness \In*ef`fi*ca"cious*ness\, n. Lack of effect, or of power to produce the effect; inefficacy. [1913 Webster]