The word "musser" is spelled with a "u" as in "uh" and two "s"s. The IPA phonetic transcription for this is /ˈmʌsər/. The "u" sound in "musser" is a short vowel sound and is pronounced with a quick, open mouth position. The two "s"s represent the sibilant sound, which is a hissing or shushing sound, created by pushing air through a narrow opening between the tongue and the teeth. Together, these sounds create the distinct pronunciation of the word "musser".