Etymology
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self-sufficiency (n.)

"inherent fitness for all ends and purposes and independence of others," 1620s, originally also an attribute of God (translating Greek autakreia); see self + sufficiency. Of mortals, "ability to supply one's own needs," it is implied by 1580s (compare self-sufficient). Sometimes formerly also "an overweening opinion of one's talent or worth" (1690s).

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Definitions of self-sufficiency

self-sufficiency (n.)
personal independence;
Synonyms: autonomy / self-direction / self-reliance
From wordnet.princeton.edu