köken: Inherited from Old Spanish otero, of uncertain origin; possibly from Latin altārium, or alternatively from Old Spanish oto (“high”) (from Latin altus; see Spanish alto) with the suffix -ero. Cognate with Galician outeiro, Portuguese outeiro. Cf. also altar.
millstone, a circular stone of the two that make up the ordinary mill, one is mobile and is rolled over the other, which is fixed · the amount of water needed to move a millstone