The word "impressivenesses" is a mouthful to pronounce, and its spelling can be equally daunting. In IPA phonetic transcription, the word is spelled as /ɪmˈprɛsɪvnɪsɪz/. This long word is comprised of the roots "impressive" and "-ness," which both contribute to the final spelling. The suffix "-es" is added to indicate plural form. The word serves as an example of the complexity and depth of English vocabulary, highlighting the need for attention to detail when communicating effectively.