confidence in one's own powers / calmness and composure, especially when under stress

The capacity to rely on one's own capabilities, and to manage one's own affairs; independence.

plural of self

Chiefly preceded by the: precisely the same; the very same; identical.

(archaic) Chiefly preceded by the: precisely the same person or thing.

A feeling of contempt toward oneself.

A feeling of pity for oneself.

(of a house) Supplied in kit form, for construction by the owner.

(physics) Any of several general rules concerning the transitions between the states of a quantum mechanical system; they derive from the symmetry properties of the states and of their interactions

Having the quality of justifying itself.