Pronunciation: [ˌʌnɪmpˈe͡ədɪŋ] (IPA)
Correct spelling for the English word "unimpairedding" is [ˌʌnɪmpˈe͡ədɪŋ], [ˌʌnɪmpˈeədɪŋ], [ˌʌ_n_ɪ_m_p_ˈeə_d_ɪ_ŋ] (IPA phonetic alphabet).