The spelling of the word "SONI" can be explained using the International Phonetic Alphabet (IPA) as /ˈsoʊni/. The first sound represented by /s/ is an unvoiced consonant and the second sound represented by /oʊ/ is a diphthong that combines the sounds /o/ and /ʊ/. The final sound represented by /ni/ is a combination of the consonant /n/ and the vowel /i/. Overall, the spelling of "SONI" accurately represents the sounds in the word.