Pronunciation: [tˌiːˌe͡ɪt͡ʃˈɛstˌiːˈe͡ɪt͡ʃ] (IPA)
Correct spelling for the English word "thsth" is [tˌiːˌe͡ɪt͡ʃˈɛstˌiːˈe͡ɪt͡ʃ], [tˌiːˌeɪtʃˈɛstˌiːˈeɪtʃ], [t_ˌiː__ˌeɪ_tʃ_ˈɛ_s_t_ˌiː__ˈeɪ_tʃ] (IPA phonetic alphabet).
Correct spelling for thsth