The dictionary of stems, roots, and affixes for the Blackfoot language provides, for each entry, information on the item's morphological type (e.g., noun stem, verb stem, root), subclassification if relevant, English index, and certain diagnostic inflectional forms (full words or sentences), each with an English translation. In addition, entries may include idioms and other uses that may be helpful, information on variation, synonyms, and grammatical irregularities, cross-reference to entries for constituent morphemes, and in the case of verbs, related stems. An introductory section details the dictionary's format and usage. An appendix describes the Blackfoot alphabet and some spelling conventions. (MSE)