The morphological process of reduplication occurs in languages throughout the world. is the first volume to focus on reduplication in South America. The indigenous languages of South America remain under-documented and little accessible to theoretical linguistics. Most regions and language families of the continent are represented in articles based on recent fieldwork by the authors. Included are data concerning a diverse set of reduplication phenomena from the Andes, Amazonia, and other regions of the continent. A wide range of language families and isolates are discussed, such as Tupian, Quechuan, Mapuche, Tacanan, Arawakan, Barbacoan, and Macro-Jê. Several languages present unusual properties, some of which violate presumed universals, such as no partial without full reduplication.