This is the 13903rd most frequent Polish word.
popełnianych
"Committed" (referring to mistakes, crimes, or actions).
In this sentence, "popełnianych" is used as a verbal adjective describing the noun "mistakes" ("błędach"), indicating something that is being perpetrated or committed.
Codziennie uczymy się na błędach popełnianych przez innych.
Every day we learn from the mistakes made by others.
Here, "popełnianych" functions as a descriptor for "crimes" ("przestępstw"), emphasizing the nature of these crimes being committed.
Analiza popełnianych przestępstw pomaga w zapobieganiu podobnym czynnościom.
The analysis of committed crimes helps prevent similar actions.
In this example, the word "popełnianych" explains that the "violations" ("naruszeń") were actions being carried out.