This is the 714th most frequent Czech word.
závěr
Conclusion.
Here, 'závěr' is used to mean 'end', referring to the conclusion of a temporal period, in this case, the week.
Závěr týdne bude slunečný.
The end of the week will be sunny.
In this instance, 'závěr' refers to the concluding part or summary of something, specifically of a presentation.
Jeho závěr prezentace nás všechny překvapil.
His conclusion in the presentation surprised us all.
Here, 'závěr' is used in the sense of a decision or resolution reached after consideration or discussion.