This is the 300th most frequent Turkish word.
bana
"To me" or "me."
In this sentence, 'bana' functions as an indirect object pronoun meaning 'to me'.
Bana kitabını verdin.
You gave me your book.
Here, 'bana' is used to indicate 'me' as the person being believed or entrusted.
Bana inanabilir misiniz?
Can you believe me?
In this instance, 'bana' indicates the person (me) to whom help is directed.