This is the 5302nd most frequent Russian word.
оппоненту
"Opponent" – a person who opposes or argues against someone.
In this sentence, 'оппоненту' is used in the dative case, indicating the recipient of the action.
Я предоставил своему оппоненту все необходимые материалы для обсуждения.
I provided my opponent with all the necessary materials for the discussion.
Here, 'оппоненту' is also in the dative case, emphasizing the target of the offered assistance.
Мы предложили помощи нашему оппоненту, чтобы обсуждение прошло конструктивно.
We offered help to our opponent to make the discussion productive.
In this example, 'оппоненту' is again in the dative case, used to describe for whom the difficulty occurred.