This is the 1372nd most frequent Polish word.
przyznać
"Przyznać" means "to admit" or "to grant."
Here, 'przyznać' is used in the sense of admitting or acknowledging something.
Musiałam przyznać, że to była moja wina.
I had to admit that it was my fault.
In this context, 'przyznać' refers to bestowing or granting something.
Komitet postanowił przyznać nagrodę najlepszym uczniom.
The committee decided to award a prize to the best students.
Here, 'przyznać się' is a reflexive construction, meaning to confess or own up to something.