The spelling of the word "NASTI" may seem unusual at first glance, but it adheres to consistent English spelling rules. The IPA phonetic transcription of "NASTI" is /ˈnæsti/, representing the sounds of the letters in the word. The "s" sound is represented by the letter 's', while the vowel sound in the first syllable is represented by the letter 'a'. The final two letters, 't' and 'i', together represent the "ee" sound. In English, it's not uncommon for different letter combinations to represent the same sounds, as in the case of "NASTI".