Pronunciation: [fˈa͡ɪnstʌf] (IPA)
Correct spelling for the English word "finestuff" is [fˈa͡ɪnstʌf], [fˈaɪnstʌf], [f_ˈaɪ_n_s_t_ʌ_f] (IPA phonetic alphabet).
Correct spelling for finestuff