self-sustaining
adjective
                                                                                                                            
                                                            self-sus·tain·ing
                    
                                                                                                              
                                                                                                                                  ˌself-sə-ˈstā-niŋ  
                                                      
                                                          
            1
                    
                                          
              
          
                                                      : maintaining or able to maintain oneself or itself by independent effort                                      
              
                             
a self-sustaining community
                         
                
                    2
                    
                                          
              
          
                                                      : maintaining or able to maintain itself once commenced                                      
              
                             
a self-sustaining nuclear reaction
                         
                
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  Merriam-Webster unabridged




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