INEFFICACIOUSNESS

\ɪnˌɛfɪkˈe͡ɪʃəsnəs], \ɪnˌɛfɪkˈe‍ɪʃəsnəs], \ɪ_n_ˌɛ_f_ɪ_k_ˈeɪ_ʃ_ə_s_n_ə_s]\

Definitions of INEFFICACIOUSNESS

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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd