This is the 4842nd most frequent Polish word.
oprawców
"Oprawców" means "perpetrators" or "tormentors" in English, typically referring to those who commit cruel or violent acts.
Here, 'oprawców' refers to oppressors, and is used in its plural accusative form to indicate those who oppress or dominate.
Oprawców nie powstrzymywały żadne zasady.
The oppressors were not restrained by any rules.
In this sentence, 'oprawców' again refers to oppressors but emphasizes the identification of these individuals.
Ofiary rozpoznały swoich oprawców po głosie.
The victims recognized their oppressors by their voice.
In this case, 'oprawcami' (instrumental plural form of 'oprawców') is used to discuss antagonists within historical struggles.