Pronunciation: [d͡ʒˈʌste͡ɪn] (IPA)
Correct spelling for the English word "Justain" is [d͡ʒˈʌste͡ɪn], [dʒˈʌsteɪn], [dʒ_ˈʌ_s_t_eɪ_n] (IPA phonetic alphabet).
Correct spelling for Justain