This is the 61st most frequent Estonian word.
sel
The Estonian word "sel" is the shortened form of "sellel," meaning "on this" or "on it."
In this sentence, 'sel' operates in the locative case, referring to 'this' within the context of the week.
Ma kuulsin sel nädalal uut laulu.
This week, I heard a new song.
Here, 'sel' is used in the locative case, referring specifically to 'this' table within the context.
Sel laual on raamat.
On this table, there's a book.
'Sel' in this example is used to refer to 'this topic', showing its usage in discussing specific subjects.