The spelling of the word "OOIA" might seem confusing, but it can be broken down with the help of IPA phonetic transcription. The first syllable, "OO," represents the sound /u/ as in "boot." The second syllable, "IA," represents the diphthong /aɪ/ as in "eye." Therefore, the correct pronunciation of "OOIA" is /u-aɪ-a/. The unusual spelling of this word may make it difficult to remember, but understanding its phonetic structure can help with proper pronunciation.