Pronunciation: [ˈanhtdə͡ʊ] (IPA)
Correct spelling for the English word "ANHTDO" is [ˈanhtdə͡ʊ], [ˈanhtdəʊ], [ˈa_n_h_t_d_əʊ] (IPA phonetic alphabet).
Correct spelling for ANHTDO