This is the 12929th most frequent Polish word.
obwiniać
To accuse or blame.
Here, 'obwiniać' is used in the context of assigning blame or responsibility for an error to other people.
Nie powinieneś obwiniać innych za swoje błędy.
You shouldn't blame others for your own mistakes.
This usage illustrates 'obwiniać' in the reflexive sense, where the subject is attributing fault to himself.
Marcin zwykle obwinia siebie, gdy coś pójdzie nie tak.
Marcin usually blames himself when something goes wrong.
In this sentence, 'obwiniać' is used to express the abstention from assigning blame to someone.