The word "ascience" does not actually exist in English, but if we were to try to spell it phonetically, it might look like /əˈsaɪəns/ (uh-SY-uns). The first syllable is pronounced with a schwa vowel sound, while the second syllable is stressed and contains the long "i" sound. However, it's important to note that this spelling is purely hypothetical and not based on any recognized word or standard pronunciation.