self-sufficient

UK: /ˌsɛlfsəˈfɪʃ^ənt/ US: (self′sə fish′ənt, self′-)

WordReference Random House Learner's Dictionary of American English © 2025

ˈself-sufˈfi•cient,  adj. 

1. able to supply one's or its own needs without help.

self--suf•fi•cien•cy, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2025

self-suf•fi•cient  (self′sə fish′ənt, self′-), adj. 

1. able to supply one's own or its own needs without external assistance:
   The nation grows enough grain to be self-sufficient.
2. having extreme confidence in one's own resources, powers, etc.:
   He was self-sufficient, and always reminded you of it.

Also, self-suf•fic•ing  (self′sə fī′sing). 

• 1580–90

self′-suf•fi′cien•cy, n. 
self′-suf•fi′cient•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

self-sufficient, self-sufficing adjective

1. able to provide for or support oneself without the help of others

ˌself-sufˈficiency noun

ˌself-sufˈficiently adverb