The spelling of the word "more mussedup" can be broken down phonetically using the International Phonetic Alphabet as [mɔr ˈmʌstʌp]. This means that the first syllable is pronounced as "mor" with an open-o sound, followed by the stressed syllable "mussedup" which is pronounced with a short u sound. The double s in "mussedup" indicates a stressed syllable, while the final p is pronounced with a plosive sound. Spelling can be tricky, so it's important to break down words phonetically to ensure proper pronunciation.