Pronunciation: [ˌɛstˌiːˌɛfˈe͡ɪ] (IPA)
Correct spelling for the English word "STFA" is [ˌɛstˌiːˌɛfˈe͡ɪ], [ˌɛstˌiːˌɛfˈeɪ], [ˌɛ_s_t_ˌiː__ˌɛ_f_ˈeɪ] (IPA phonetic alphabet).
Correct spelling for STFA