UNPROFICIENCY

\ʌnpɹəfˈɪʃənsi], \ʌnpɹəfˈɪʃənsi], \ʌ_n_p_ɹ_ə_f_ˈɪ_ʃ_ə_n_s_i]\
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2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.