This is the 5179th most frequent Polish word.
przypadkiem
"Przypadkiem" means "by accident" or "by chance" in English.
The word 'przypadkiem' here means 'by accident', indicating an unintended discovery.
Przypadkiem znalazłem stare zdjęcia na strychu.
By accident, I found old photos in the attic.
'Przypadkiem' is used to indicate the occurrence of an event by coincidence or chance.
Przypadkiem mogło do tego dojść, gdyż nikomu nie zwrócono uwagi.
This could have happened by coincidence since no one was warned.
Here, 'przypadkiem' communicates the notion of 'happened to', used in a question to inquire if something occurred unintentionally.