This is the 14538th most frequent Russian word.
партнеру
"To the partner."
In this sentence, 'партнеру' is the dative case of 'партнер', showing to whom the proposal was sent.
Я отправил предложение своему деловому партнеру.
I sent the proposal to my business partner.
Here, 'партнеру' is used in the dative case, indicating the recipient of the message or communication.
Помогите понять, что я хочу сказать моему партнеру.
Help me understand what I want to say to my partner.
In this example, 'партнеру' is in the dative case, specifying the recipient of the explanation or action.