The word "nattinesses" is spelled with three syllables, with stress on the second syllable. The IPA phonetic transcription for this word is /ˈnætɪnəsɪz/. The first syllable is pronounced as "nat" with the short vowel /æ/, the second syllable is pronounced with the long vowel /i/ as "tee", and the third syllable is pronounced with the short vowel /ə/ as "nuh". The suffix "-nesses" is added to "nattiness," which means having a neat and tidy appearance.