In this article, the views of the great medieval linguist Mahmud Zamakhshari in his work “Al-Mufassal fi sanati-l-i'rab” on the Arabic language “maf'ul -– مفْعُول”, i.e. the object and its variance, are compared with the views of modern Arab scholars. Linguists such as Mustafa Ghalayini, Abbas Hasan, Antoine ad-Dahdah, Nemat Fuad, Abu Bakr Abdul Alim, and the methods of expressing this topic are included in the analysis.