This is the 498th most frequent Finnish word.
anna
"Anna" in Finnish means "give" (imperative form).
In this sentence, 'anna' is the imperative form of the verb 'antaa', meaning 'to give'.
Anna kirja minulle.
Give the book to me.
Here, 'Anna' is a proper noun, a common Finnish female first name, and it doesn't relate to the verb 'antaa'.
Anna on kaunis nimi.
Anna is a beautiful name.
In this context, 'anna' is used in an imperative structure, suggesting an action (allow or let me assist).