This is the 2537th most frequent Polish word.
owszem
"Owsem" means "indeed" or "yes, certainly" in English.
In this usage, 'owszem' validates the possibility or plausibility of a statement.
Owszem, tak mogło się zdarzyć.
Indeed, that could have happened.
In this sentence, 'owszem' is used to agree affirmatively and assertively.
Owszem, zgadzam się z tobą.
Indeed, I agree with you.
Here, 'owszem' confirms with emphasis a positive response to a question.