This is the 7556th most frequent Polish word.
kuna
"Marten" (a small carnivorous mammal) or "kuna" (former Croatian currency).
Here, 'kuna' is used as a noun referring to the animal (marten).
W lesie zauważyłem dziką kunę skaczącą po drzewach.
In the forest, I noticed a wild marten jumping through the trees.
Here, 'kuna' is used as a noun referring to the currency of Croatia (kuna).
Chciałbym kupić skórzaną torbę za sto kun.
I would like to buy a leather bag for a hundred kunas.
Again, 'kuna' refers to the animal (marten) in a descriptive context.