Pronunciation: [hˈadəst wˈɒn dɪspˈə͡ʊzə͡l] (IPA)
Correct spelling for the English word "haddest one disposal" is [hˈadəst wˈɒn dɪspˈə͡ʊzə͡l], [hˈadəst wˈɒn dɪspˈəʊzəl], [h_ˈa_d_ə_s_t w_ˈɒ_n d_ɪ_s_p_ˈəʊ_z_əl] (IPA phonetic alphabet).