self

noun

One individual's personality, character, demeanor, or disposition.
one's true self; one's better self; one's former self
The subject of one's own experience of phenomena: perception, emotions, thoughts.
An individual person as the object of his own reflective consciousness (plural selves).
Self-interest or personal advantage.
Identity or personality.
A seedling produced by self-pollination (plural selfs).
A flower having its colour uniform as opposed to variegated.
Any molecule, cell, or tissue of an organism's own (belonging to the self), as opposed to a foreign (nonself) molecule, cell, or tissue (for example, infective, allogenic, or xenogenic).

verb

adjective

Having its own or a single nature or character throughout, as in colour, composition, etc., without addition or change; of the same kind; unmixed.
a self bow: one made from a single piece of wood
Same, identical.
Belonging to oneself; own.
Of or relating to any molecule, cell, or tissue of an organism's own (belonging to the self), as opposed to a foreign (nonself) molecule, cell, or tissue (for example, infective, allogenic, or xenogenic).

pronoun

Himself, herself, itself, themselves; that specific (person mentioned).
This argument was put forward by the defendant self.
Myself.
I made out a cheque, payable to self, which cheered me up somewhat.