This is the 6578th most frequent Polish word.
david
The term "david" is not a Polish word; it is a given name.
In this sentence, 'David' is used as a proper noun, referring to a person's name.
David gra na pianinie.
David plays the piano.
Here, 'Dawida' (David) is used as a possessive noun to indicate ownership - 'David's story'.
Historia Dawida jest inspirująca.
David's story is inspiring.
In this sentence, 'Dawid' (David) is used as a subject proper noun, describing a person characteristically.