The correct spelling of the word "Tavist" is T-A-V-I-S-T. This word is a brand name of a medication used to treat allergies. The pronunciation of Tavist is /ˈteɪvɪst/, with the stress on the first syllable. The IPA phonetic transcription of Tavist is /ˈteɪvɪst/. It is important to spell words correctly, especially when it comes to brand names or medical terms, to avoid confusion and ensure effective communication.