This is the 6623rd most frequent Korean word.
우승자를
"우승자를" means "winner" in English.
In this sentence, '우승자를' refers to 'the winner' as the object of the verb '축하하다' (to congratulate).
우승자를 축하하는 장면이 매우 감동적이었다.
The scene of congratulating the winner was very moving.
Here, '우승자를' serves as the object of the verb '알고 싶다' (want to know).
모두가 우승자를 알고 싶어했다.
Everyone wanted to know the winner.
In this example, '우승자를' is the object of the verb '발표하다' (to announce).