This is the 17184th most frequent Polish word.
zacznij
"Zacznij" means "start" or "begin" in English.
In this sentence, 'zacznij' is used as an imperative verb, addressing someone to begin an action, specifically starting to engage with a new book.
Zacznij nową książkę, którą kupiłeś.
Start reading the new book you bought.
Here, 'zacznij' serves as a motivational imperative verb, prompting immediate commencement of action.
Nie czekaj, zacznij działać już teraz.
Don't wait, start taking action right now.
In this context, 'zacznij' is used as a guideline or advice imperative, suggesting an action to begin the day effectively.