The spelling of the word "POUSTIE" follows the International Phonetic Alphabet (IPA) as /pʊsti/. The first sound is the voiceless bilabial plosive /p/, followed by the high back unrounded vowel /ʊ/. The next sound is the voiceless alveolar fricative /s/, and the final sound is the voiceless alveolar plosive /t/. This phonetic transcription represents the sounds heard in the word "POUSTIE", which may be useful in understanding and pronouncing the word correctly.