The spelling of the word "Aiodin" is determined by its phonetic transcription, which is /eɪˈjəʊdɪn/. This means that it is pronounced as "ay-oh-din", with the stress on the second syllable. The "ai" sound represents the vowel sound in "hay" and "pay", while the "o" sound is pronounced like "oh". The "d" and "n" sounds are pronounced as usual. By understanding its phonetic transcription, one can easily spell and pronounce the word "Aiodin" correctly.