Pronunciation: [ɡɹˈɛsɪt] (IPA)
Correct spelling for the English word "gressett" is [ɡɹˈɛsɪt], [ɡɹˈɛsɪt], [ɡ_ɹ_ˈɛ_s_ɪ_t] (IPA phonetic alphabet).