The spelling of the word "uninterestingnesses" follows a rather complicated pattern. The word starts with the prefix "un-", which means "not". Then, it is followed by the root word "interesting". To show that the word is in the plural form, "-ness" is added. Finally, "es" is added to show that the word is plural. The phonetic transcription of "uninterestingnesses" is /ʌnˈɪntrəstɪŋnəsɪz/. Despite its complexity, this long word simply means a lack of appeal or interest.