autarkic
/ɒˈtɑːkɪk/ or /ˌɔːtɑrˈkɪk/Definitions
1. adjective
self-sufficient or able to live without external assistance
“The small town was autarkic and had its own system for producing food and energy.”
2. noun
a person or thing that is self-sufficient
“The autarkic nation has been a model for other countries to follow.”