ˌshastəˈkȯstə noun
( plural chastacosta or chastacostas )
Usage: usually capitalized
Etymology: Chastacosta Shista-Kwŭsta
1.
a. : an Athapaskan people in the Illinois and Rogue river valleys, Oregon
b. : a member of such people
2. : the language of the Chastacosta people