The word "PACAI" is spelled using the International Phonetic Alphabet (IPA) as pəˈt͡saɪ. The first letter, "p", represents the voiceless bilabial plosive sound. The second letter, "ə", is a schwa sound. The third letter, "t͡s", represents the affricate sound made by combining the voiceless alveolar plosive and the voiceless alveolar fricative. The fourth letter, "a", is pronounced as a short "a". The fifth letter, "ɪ", represents the short "i" sound. This spelling accurately represents the pronunciation of the word "PACAI."