The origin and history of coffee dates back to the 10th century, and possibly earlier with a number of reports and legends surrounding its first use. The native (undomesticated) origin of coffee is thought to have been Ethiopia. The earliest substantiated evidence of either coffee drinking or knowledge of the coffee tree is from the 15th century, in Yemen. By the 16th century, it had reached the rest of the Middle East, South India (Coorg), Persia, Turkey, Horn of Africa, and northern Africa. Coffee then spread to the Balkans, Italy and to the rest of Europe, to South East Asia and then to America. The word "coffee" entered the English language in 1582 via the Dutch koffie, borrowed from the Ottoman Turkish kahve, in turn borrowed from the Arabic qahwah (قهوة). The word qahwah is sometimes alternatively traced to the Arabic quwwa ("power, energy"), or to Kaffa, a medieval kingdom in Ethiopia whence the plant was exported to Arabia. These etymologies for qahwah have all been disputed, however. The name qahwah is not used for the berry or plant (the products of the region), which are known in Arabic as bunn and in Oromo as būn. Semitic had a root qhh "dark color", which became a natural designation for the beverage.