This is the 11648th most frequent Polish word.
klęską
"Klęską" means "disaster" or "defeat."
Here, 'klęską' refers to 'disaster', indicating a great loss or defeat.
Ta wojna skończyła się klęską dla obu stron.
This war ended in a disaster for both sides.
In this sentence, 'klęską' is used to describe 'defeat' in the context of a failure or setback.
Niepowodzenie podczas zawodów było dla niego dużą klęską.
The failure during the competition was a major defeat for him.
Here, 'klęską' denotes 'failure', showing that something did not succeed as intended.