This is the 464th most frequent Hungarian word.
ezen
"This" (used to refer to something close in time, space, or context).
In this sentence, 'ezen' is used as a demonstrative pronoun referring specifically to 'this table', indicating proximity.
Ezen az asztalon van egy könyv.
On this table, there is a book.
Here, 'ezen' is an adverb modifying 'héten,' specifying the current week.
Ezen a héten sokat fogunk tanulni.
This week, we will learn a lot.
In this context, 'ezen' is used similarly to 'on this' to locate something spatially, referring to the specific page.