"IDOMAIN" is a made-up word with no clear meaning, but its spelling can be explained through phonetic transcription. According to the International Phonetic Alphabet, "IDOMAIN" can be spelled as /aɪdəmeɪn/. The first syllable is pronounced as the diphthong "ai" (as in "high"), followed by a short schwa sound, and then the word "main" with a long "a" sound. While this spelling may be unconventional and unclear, phonetic transcription can help us understand how to pronounce unfamiliar words.