This is the 2168th most frequent Polish word.
powinni
"Powinni" means "they should" in English.
Here, 'powinniśmy' is used as the first-person plural form of 'should' indicating obligation or a recommendation.
Powinniśmy iść do szkoły.
We should go to school.
'Powinniście' is the second-person plural form of 'should', conveying advice or encouragement.
Powinniście być bardziej uprzejmi.
You should be more polite.
'Powinni' is the third-person plural form of 'should', presenting an expectation or presumption.