This is the 1539th most frequent Polish word.
błędów
The Polish word "błędów" means "errors" or "mistakes" (genitive plural form of "błąd").
The word 'błędów' is used in its genitive plural form as it follows the verb naprawiać, which often takes its object in the genitive when indicating errors or mistakes.
Naprawiam błędy w mojej pracy domowej.
I am correcting errors in my homework.
Here, 'błędów' is again in the genitive plural form, following the verb unikać, which requires the genitive case for its object.
Unikam błędów podczas rozmowy po angielsku.
I avoid mistakes when speaking in English.
In this example, 'błędów' is used in the genitive plural case, following the phrase 'pozbyć się', which governs the genitive case to indicate what is being removed.