The spelling of the word "IRUS" is unique and may cause some confusion. The correct pronunciation is /ˈaɪrəs/. The use of the letter "I" at the beginning of the word can be misleading but it actually represents the phoneme /aɪ/. The following letters "RU" represent the phoneme /r/ and the final letter "S" represents the phoneme /s/. Thus, the correct phonetic transcription of "IRUS" is /ˈaɪrəs/, which sounds like "eye-rus." This transcription helps to clarify the correct pronunciation of this uncommon word.