Vocabulary: match the word that best matches key term definition. _____ natural boundary a. to gain or acquire _____ culture hearth b. a large temple built by the Sumerians _____ embargo c. a center where cultures developed and from which ideas and traditions spread outward _____ qanat d. an underground canal first build by the ancient Persians _____ assume e. a ban on trade _____ ziggurat f. wedge-shaped symbols that were pressed into clay tablets _____ participate g. a boundary created by a physical feature, such as a mountain, river, or strait _____ cuneiform h. to take part in