The word "DIEN" is spelled using the International Phonetic Alphabet (IPA) as /diːn/. The first sound, represented by "d," is a voiced dental plosive sound. The second sound, represented by "i," is a long vowel pronounced with the tongue in the high-front position. Finally, the "n" sound is a voiced alveolar nasal sound. This spelling pattern is commonly found in words of Indo-European origin and can be pronounced differently depending on the language or dialect.