The word "Relbun" is a made-up word that does not have a standard spelling in English. However, we can use the International Phonetic Alphabet to explain its spelling. In IPA, "Relbun" can be transcribed as /ˈrɛlbʌn/. The first syllable starts with a stressed "ɛ" sound, followed by a "l" sound, then an unstressed "bʌ" sound, and ends with an "n" sound. The letter "e" is pronounced as "ɛ" in this transcription to show the correct vowel sound.