pronoun
that same one
a - used as the object of a verb or preposition to refer to something that has already been mentioned
b - used for emphasis to refer to something that has already been mentioned
used after a noun to say that someone or something has a lot of a particular quality
by itself
on its own :without being directly controlled by a person
with nothing nearby :alone
in itself
in its own nature :when considered as something separate from other things