This is the 197th most frequent Slovenian word.
četrtek
"Četrtek" means "Thursday" in English.
Here, 'četrtek' is used as a noun to denote a specific day of the week.
Četrtek je moj najljubši dan v tednu.
Thursday is my favorite day of the week.
In this sentence, 'četrtek' is used to specify when in the week the action will take place, preceded by 'v' to mark 'on.'
V četrtek bom obiskal prijatelja.
On Thursday, I will visit a friend.
Here, 'četrtek' acts as a noun modified by 'vsak' to imply a recurring event on this day of the week.