pronoun
that same man, boy, or male animal
a - used as the object of a verb or preposition to refer to a man, boy, or male animal that has already been mentioned
b - used for emphasis to refer again to a man, boy, or male animal that has already been mentioned
that same person - used to indicate either a male or female object of a verb or preposition
This use of himself was common in the past but is now often avoided because it is considered sexist.
his normal or healthy self
by himself
without any help from other people
with nobody else :alone
every man for himself