This is the 3144th most frequent Polish word.
przyniósł
"Brought" (past tense of "bring").
Here the word 'przyniósł' refers to the action of 'bringing' something from somewhere to the current location, performed by a male subject.
On przyniósł książki ze swojej kolekcji.
He brought books from his collection.
In this sentence, 'przyniósł' is used to ask about the past action of bringing something (flowers) to an event (meeting).
Czy przyniósł kwiaty na spotkanie?
Did he bring flowers to the meeting?
The usage of 'przyniósł' here conveys that 'Piotr' has delivered or brought something (good news) to others.