najpierw

In a sentence

• Najpierw muszę umyć naczynia, potem zrobię ciastka.

  First, I need to wash the dishes, then I will bake cookies.

  The word "najpierw" introduces the first action in a sequence of events, indicating its temporal precedence.

• Możemy najpierw odwiedzić muzeum, a potem iść na obiad.

  We can first visit the museum, and then go for lunch.

  Here, "najpierw" suggests the initial activity out of multiple planned activities.

• Najpierw zajrzyj do książki, zanim zapytasz o pomoc.

  First, look into the book before asking for help.

  In this instance, "najpierw" emphasizes the preferred first action before another takes place.