This is the 3rd most frequent Croatian word.
na
"Na" in Croatian means "on," "at," or "onto," depending on the context.
In this context, 'na' is used to express a manner or method, meaning 'in'.
Razmišljam na tvoj način.
I am thinking in your way.
In this sentence, 'na' is used to indicate location, meaning 'on'.
Na stolu je knjiga.
There is a book on the table.
Here, 'na' indicates direction or destination, meaning 'to'.