This is the 8601st most frequent Polish word.
przydacz
The word "przydacz" does not exist in Polish; it might be a typo.
Here, 'przydać się' means 'to come in handy or be useful', showing its utility in a context of usefulness.
Ten stary samochód w końcu może się przydać.
This old car finally might come in handy.
In this sentence, 'przydać' is used to express adding or applying, specifically effort in this case.
Musisz przydać więcej wysiłku do tego projektu.
You need to apply more effort to this project.
The verb 'przydać się' is applied in a personal request context, meaning someone's utility or helpfulness.