Pronunciation: [ɪlˈɪsɪtəs] (IPA)
Correct spelling for the English word "Illicitous" is [ɪlˈɪsɪtəs], [ɪlˈɪsɪtəs], [ɪ_l_ˈɪ_s_ɪ_t_ə_s] (IPA phonetic alphabet).