This is the 16546th most frequent Turkish word.
yenilgisinin
"Yenilgisinin" means "of his/her/its defeat" in English.
Here, 'yenilgisinin' means 'of the defeat,' showing possession or relation to 'the team's'.
Takımın yenilgisinin sebebi eksik oyuncular oldu.
The team's defeat was caused by missing players.
In this sentence, 'yenilgisinin' specifies 'the defeat of the competitor' in a possessive structure.
Yarışmacının yenilgisinin ardından tören sona erdi.
After the competitor's defeat, the ceremony ended.
Here, 'yenilgisinin' indicates 'of his defeat,' signifying lessons associated with the defeat.