The spelling of the word "Taci" can be understood using the International Phonetic Alphabet (IPA). The first sound is /t/ which is a voiceless alveolar plosive. The second sound is /a/ which is a vowel pronounced with an open mouth. The third sound is /s/ which is a voiceless alveolar fricative. The final sound is /i/ which is a vowel pronounced as an "ee" sound. Therefore, the spelling of "Taci" follows the phonetic transcription /ˈtæsi/.