Pronunciation: [tɹˈe͡ɪtuː] (IPA)
Correct spelling for the English word "TREITU" is [tɹˈe͡ɪtuː], [tɹˈeɪtuː], [t_ɹ_ˈeɪ_t_uː] (IPA phonetic alphabet).
Correct spelling for TREITU