The word "ISNNI" is not found in any standard dictionary, and its spelling appears to be arbitrary. However, we can use the International Phonetic Alphabet (IPA) to break down the sounds of this word. "I" is pronounced as "iy", "S" as "s", "N" as "n", and "NI" as "nɪ". Therefore, the phonetic transcription of "ISNNI" would be /iy-s-n-nɪ/. While this spelling may not have any meaning, the sounds can be useful in creating new words or names.