Pronunciation: [ˈʌn ɹɪsˈɛptɪvnəsɪz] (IPA)
Correct spelling for the English word "un receptivenesses" is [ˈʌn ɹɪsˈɛptɪvnəsɪz], [ˈʌn ɹɪsˈɛptɪvnəsɪz], [ˈʌ_n ɹ_ɪ_s_ˈɛ_p_t_ɪ_v_n_ə_s_ɪ_z] (IPA phonetic alphabet).