UNSUBSTANTIATED

\ʌnsəbstˈanʃɪˌe͡ɪtɪd], \ʌnsəbstˈanʃɪˌe‍ɪtɪd], \ʌ_n_s_ə_b_s_t_ˈa_n_ʃ_ɪ__ˌeɪ_t_ɪ_d]\
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2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.