This is the 12543rd most frequent Polish word.
napisaliśmy
"We wrote."
The word 'napisaliśmy' is used here as the past tense of 'napisać' in the first person plural form to indicate the action of writing which was completed in the past by 'we'.
Wczoraj napisaliśmy list do naszego przyjaciela.
Yesterday we wrote a letter to our friend.
In this sentence, 'napisaliśmy' describes the act of completing a written work collectively in the past, emphasizing the subject of 'we'.
Napisaliśmy artykuł, który został opublikowany w gazecie.
We wrote an article which was published in the newspaper.
Here, 'napisaliśmy' is used in a question formed in past perfect tense to inquire whether the act of writing the report was completed by 'we'.