This is the 79th most frequent Polish word.
teraz
"Teraz" means "now" in English.
Here, "teraz" indicates the current moment in time.
Teraz czytam książkę.
Now I am reading a book.
"Teraz" here emphasizes the urgency of the current situation.
Musimy teraz podjąć decyzję.
We need to make a decision now.
In this sentence, "teraz" contrasts the present situation with a past one.