Correct spelling for the English word "Margarate" is [mˌɑːɡəɹˈe͡ɪt], [mˌɑːɡəɹˈeɪt], [m_ˌɑː_ɡ_ə_ɹ_ˈeɪ_t] (IPA phonetic alphabet).
A compound of margaric acid with a base.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.