The spelling of the word "CASASME" can be understood through its IPA phonetic transcription. It is pronounced as /kəˈsæzmɛ/. The first syllable 'ka' is pronounced with a short 'u' sound, followed by 'sas' with a short 'a' sound. The final syllable 'me' has a long 'e' sound. The 'z' is pronounced as /z/ and the stress is on the second syllable. Despite its unconventional spelling, the IPA transcription helps to understand the pronunciation of the word "CASASME".