Born and died in Khwarizm, al-Zamakhshari (1075-1144 AD), was one of the great scholars of the twelfth century. Best known for his work on Arabic grammer, he was the first of the four great masters of Arabic grammar who during the twelfth century amalgamated and refined the debates of previous centuries. He is particularly popular for his very orderly arrangement of ideas.
The Kitab al-Mufassal, written in 1119, is probably al-Zamakshari's most respected and well-known book on Arabic grammar. There are four sections of the work (nouns, verbs, particles and phonology) as well as numerous subdivisions (fusul) (see C. Brockelmann, Geschichte der Arabischen Litteratur, Leiden 1943, GI, pp. 344-50, SI pp. 507-13 and M.J.L.Young, J.D.Latham and R.B.Serjeant (eds.), Religion, Science and Learning in the Abbasid Period, Cambridge 1990, pp.49-50 and pp.133-4).