The word "duenesses" is a plural form of "dueness," which refers to the state or quality of being due. Its spelling can be explained using the International Phonetic Alphabet (IPA) as /ˈduːnesɪz/. The first syllable "due" is pronounced as /duː/, followed by the suffix "-ness," pronounced as /nɪs/. To form the plural, the letter "s" is added at the end, pronounced as /ɪz/. "Duenesses" may be a rare and uncommon word, but its spelling is straightforward when understanding the IPA phonetic transcription.