This is the 14713th most frequent Turkish word.
rakibini
"Rakibini" means "their opponent" or "their rival" in English.
Here, 'rakibini' is used as the accusative form of 'rakip,' referring to the opponent that is the object of the action.
Rakibini yenmek için çok çalıştı.
He worked hard to defeat his opponent.
In this sentence, 'rakibini' refers to the direct object of 'tebrik etti,' describing the action directed towards the opponent.
Rakibini tebrik etti ve başarılar diledi.
He congratulated his opponent and wished them success.
Here, 'rakibini' is in the accusative case, indicating the opponent being analyzed by the subject of the sentence.