Maghreb (the predominantly Arabic-speaking geographic region comprising northwest Africa, particularly the region of Africa north of the Sahara and west of the Nile; the coastal plains of Morocco, Algeria, Tunisia, and western Libya)
مَغَارِبَة (maḡāriba, “Maghrebis”) + ـِيّ (-iyy). مَغَارِبَة (maḡāriba) is the plural of مَغْرِبِيّ (maḡribiyy, “Maghrebi”), derived from الْمَغْرِب (al-maḡrib, “Maghreb”).