"Deteriority" is spelled with the letters d-e-t-e-r-i-o-r-i-t-y. According to the International Phonetic Alphabet, it can be transcribed as /dɪˌtɪəriˈɒrəti/. The word is derived from the noun "deterioration," which means the state of becoming worse or less valuable. The suffix "-ity" is added to the root word to create the abstract noun form. The spelling may seem complicated, but its pronunciation is straightforward, with five syllables and a stress on the third syllable.