Sprawca 用英语:

The definition of a perpetrator is a person who commits an illegal or bad act. An example of a perpetrator is a person who robs a bank.

Something that is intentional on the part of the perpetrator; it has to involve some kind of power imbalance, so it's not an argument between equals, and it's something that is repetitive.

e also predicted that many of the New Year's Eve perpetrators will never be convicted

The perpetrator wiped his hands on the curtain.

The perpetrators of the terrorist attack must be punished.

There is great public pressure to bring the perpetrators of these crimes to justice.

Such conduct would subject the offender to a heavy penalty.

The police spotted him at once as the offender.

The political offender rebelled against the police authority.