Origin: 1275–1325;Middle Englishasure < Anglo-French,Old French, ultimately alteration of Arabical lazuwar(d) (by misdividing the initial l together with the article) < Persianlāzhuwardlapis lazuli
early 14c., from O.Fr. azur, from a false separation of Arabic (al)-lazaward "lapis lazuli," as though the -l- were the French article l'. The Arabic name is from Pers. lajward, from Lajward, a place in Turkestan, mentioned by Marco Polo, where the stone was collected.