This is the 85th most frequent Hungarian word.
azt
The Hungarian word "azt" means "that" (accusative form).
In this sentence, 'azt' is used as a demonstrative pronoun referring to the idea or opinion being discussed.
Én azt gondolom, hogy igazad van.
I think that you are right.
Here, 'azt' is referring to the book, emphasizing it as the object of the sentence.
Azt a könyvet szeretném elolvasni.
I would like to read that book.
In this context, 'azt' refers generally to the preceding statement or concept being mentioned.