Pronunciation: [ˌɛtɪˈɒstɪk] (IPA)
Correct spelling for the English word "Eteostic" is [ˌɛtɪˈɒstɪk], [ˌɛtɪˈɒstɪk], [ˌɛ_t_ɪ__ˈɒ_s_t_ɪ_k] (IPA phonetic alphabet).