The word "ASST" is not a correct spelling in English. However, it is an abbreviation of the word "assistant". The correct spelling of the word is /əˈsɪstənt/. The first syllable is pronounced with a schwa sound followed by the /s/ sound. The second syllable is pronounced with a short /ɪ/ sound, followed by the /s/ sound again, and ending with a /t/ sound. It is important to use correct spelling and pronunciation to effectively communicate in English.