The language of the Tohono O'odham (formerly known as Papago) and Pima Indians is an important subfamily of Uto-Aztecan spoken by some 14,000 people in southern Arizona and northern Sonora. This dictionary is a useful tool for native speakers, linguists, and any outsiders working among those peoples. The second edition has been expanded to more than 5,000 entries and enhanced by a more accessible format. It includes full definitions of all lexical items; taxonomic classification of plants and animals; restrictive labels; a pronunciation guide; an etymology of loan words; and examples of usage for affixes, idioms, combining forms, and other items peculiar to the Tohona O'odham-Pima language. Appendixes contain information on phonology, kinship and cultural terms, the numbering system, time, and the calendar. Maps and charts define the locations of place names, reservations, and the complete language family.