This is the 215th most frequent Greek word.
αυτός
"Αυτός" means "he," "him," "this," or "self" depending on context.
In this sentence, "αυτός" is used as a demonstrative pronoun, denoting "he" or "this person."
Αυτός είναι ο φίλος μου.
He is my friend.
Here, "αυτός" is used as a pronoun to emphasize "him," identifying a specific individual in the context.
Είδαμε αυτός να πληρώνει το λογαριασμό.
We saw him paying the bill.
In this usage, "αυτός" functions as an adjective, meaning "this," modifying the noun "πίνακας" (painting).