The correct spelling of the word "Grierson" is pronounced as /ˈɡraɪərsən/. The first syllable "Gri" is pronounced as /ɡraɪ/, which rhymes with "eye" and "buy". The second syllable "er" is pronounced as /ər/, which is the schwa sound commonly used in English. The final syllable "son" is pronounced as /sən/, which sounds like "sun". Understanding the IPA phonetic transcription can be helpful in correctly spelling and pronouncing words, like "Grierson".