Pronunciation: [tˌɛɹɪˈɛnɪˌak] (IPA)
Correct spelling for the English word "Terrienniak" is [tˌɛɹɪˈɛnɪˌak], [tˌɛɹɪˈɛnɪˌak], [t_ˌɛ_ɹ_ɪ__ˈɛ_n_ɪ__ˌa_k] (IPA phonetic alphabet).