self

– noun
1. a person or thing referred to with respect to complete individuality.
2. a person's nature, character, etc.
3. personal interest.
4. a. the ego; that which knows, remembers, desires, suffers, etc., as contrasted with that known, remembered, etc.
b. the uniting principle, as a soul, underlying all subjective experience.
– adj.
5. being the same throughout, as a color; uniform.
6. being of one piece with or the same material as the rest.