This is the 28th most frequent Greek word.
αυτή
"Αυτή" means "she" or "this" (feminine) in English.
In this sentence, 'αυτή' is the subject and is a demonstrative pronoun used to refer to a specific female person.
Αυτή είναι η φίλη μου.
This is my friend.
In this sentence, 'αυτή' is used as an adjective modifying the noun 'ταινία' to specify which movie is liked.
Μου αρέσει αυτή η ταινία.
I like this movie.
In this sentence, 'αυτή' acts as a pronoun referring back to 'κοπέλα' and is used to continue talking about her.