This is the 7778th most frequent Polish word.
martina
"Martina" is not a Polish word; it is typically a given name used in various languages.
Here, 'Martina' is in its base form, referring to a specific individual by name.
Mam przyjaciółkę o imieniu Martina.
I have a friend named Martina.
This sentence uses 'Martina' as a proper noun—a person's name.
Martina pisze piękną powieść.
Martina is writing a beautiful novel.
In this sentence, 'Martyną' is the instrumental case of the proper noun 'Martyna', indicating an action involving Martina.