Pronunciation: [sˈʌbtɪɹˌe͡ɪna͡ʊ] (IPA)
Correct spelling for the English word "subterraneau" is [sˈʌbtɪɹˌe͡ɪna͡ʊ], [sˈʌbtɪɹˌeɪnaʊ], [s_ˈʌ_b_t_ɪ_ɹ_ˌeɪ_n_aʊ] (IPA phonetic alphabet).
Correct spelling for subterraneau