This is the 13884th most frequent Polish word.
pomyślcie
"Think" (plural imperative).
The word 'pomyślcie' is a second-person plural imperative form of the verb 'pomyśleć', used here as an instruction to a group of people to think about their dreams.
Pomyślcie o swoich marzeniach i zróbcie pierwszy krok, aby je spełnić.
Think about your dreams and take the first step to achieve them.
In this sentence, 'pomyślcie' is again used as an imperative to encourage thoughtful consideration prior to asking questions, targeted at a group.
Jeśli macie pytania, najpierw pomyślcie, a potem je zadajcie.
If you have questions, first think about them, and then ask.
Here, 'pomyślcie' instructs a group to engage in reflective thinking to improve their actions in the future.