Lisaan al-ʿArab (لسان العرب, "The Arab Tongue") was completed by Ibn Manzur in 1290. It is the most well-known dictionary of the Arabic language, as well as one of the most comprehensive. Ibn Manzur compiled it from other sources, to a large degree. The most important sources for it were the Tahdheeb al-Lugha of Azharee, the Muhkam of Ibn Sidah, the Nihaaya of al-Dhahabee and Jauharee's Sihaah as well as the glosses of the latter (Kitaab at-Tanbih wa al-Idaah) by Ibn Barree. It follows the Sihaah in the arrangement of the roots: The headwords are not arranged by the alphabetical order of the radicals as usually done today in the study of Semitic languages, but according to the last radical - which makes finding rhyming endings significantly easier. Furthermore, the Lisan al-Arab notes its direct sources, but not or seldom thei