The ability to control one's desires and impulses; willpower.

To control oneself or itself.

Alternative spelling of self-defense

The state, quality, or condition of being self-centered; concern only for oneself

Of a person, having achieved success by one's own efforts, with little to no support from family members and others. / Of a thing, made by oneself instead of bought or taken over.

Obviously true, and requiring no proof, argument or explanation.

The means of defending oneself from physical attack.

(linear algebra) Of a vector space, isomorphic to its dual space. / (mathematics, in projective geometry) Of a proposition that is equivalent to its dual.

Able to provide for one's own needs without help from others; self-sufficient. / (of a nuclear chain reaction) Able to sustain itself without the need for additional fuel.

Having, or behaving as if having, too high of an opinion of one's own importance.