This is the 5211th most frequent Polish word.
rachunku
"Rachunku" is the genitive or accusative singular form of "rachunek," meaning "bill," "invoice," or "account" in English.
Here, 'rachunek' refers to the bill or check in a restaurant context.
Poproszę o rachunek za obiad.
I'd like the bill for dinner.
In this sentence, 'rachunek' is used to mean a statement or account in financial terminology.
Musisz sprawdzić swój rachunek bankowy.
You need to check your bank account statement.
Here, 'rachunek' is employed in the context of calculation or computation in mathematics.