Pronunciation: [tɹˈɪstiːn] (IPA)
Correct spelling for the English word "Tristine" is [tɹˈɪstiːn], [tɹˈɪstiːn], [t_ɹ_ˈɪ_s_t_iː_n] (IPA phonetic alphabet).
Correct spelling for Tristine