Correct spelling for the English word "Unmagistrate" is [ʌnmˈad͡ʒɪstɹˌe͡ɪt], [ʌnmˈadʒɪstɹˌeɪt], [ʌ_n_m_ˈa_dʒ_ɪ_s_t_ɹ_ˌeɪ_t] (IPA phonetic alphabet).
The word "Unmagistrate" does not have an established etymology as it is not a widely recognized or commonly used term in the English language. It appears to be a combination of the prefix "un-" meaning "not" or "opposite of", and the word "magistrate", which refers to a civil officer or judge who administers the law. However, it is important to note that "Unmagistrate" is not a term that can be found in reputable dictionaries or linguistic sources.