Pronunciation: [ˈɪnpɪfˌɛkst] (IPA)
Correct spelling for the English word "INPEFECST" is [ˈɪnpɪfˌɛkst], [ˈɪnpɪfˌɛkst], [ˈɪ_n_p_ɪ_f_ˌɛ_k_s_t] (IPA phonetic alphabet).