Correct spelling for the English word "Amurcous" is [amˈɜːkəs], [amˈɜːkəs], [a_m_ˈɜː_k_ə_s] (IPA phonetic alphabet).
Full of lees or scum.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.