"Unimpairedded" is not a word, as it seems to be a non-existent combination of the words "unimpaired" and "added." The IPA phonetic transcription can help explain why this spelling does not make sense: /ʌnɪmpeər/ is the pronunciation of "unimpaired," while /ˈædɪd/ is the pronunciation of "added." These two words have very different sounds and cannot be combined in this way. It's important to double-check spellings to ensure they accurately reflect the intended word or phrase.