Pronunciation: [ˌa͡ɪθɪˈiːnɪ] (IPA)
Correct spelling for the English word "aythyini" is [ˌa͡ɪθɪˈiːnɪ], [ˌaɪθɪˈiːnɪ], [ˌaɪ_θ_ɪ__ˈiː_n_ɪ] (IPA phonetic alphabet).