The etymology of the word Andes has been debated. The major consensus is that it derives from the Quechua word anti, which means "high crest". Others believe that Andes comes from Anti Suyu, one of the four regions of the Inca empire. It is more likely however that the word Antisuyo derives from the use of Anti to designate mountain chains. Derivation from the Spanish andén (in the sense of cultivation terrace) has also been proposed, yet considered very unlikely.