This is the 3103rd most frequent Russian word.
клиенту
The Russian word "клиенту" means "to the client" or "to the customer".
The word 'клиенту' is in the dative case, which is used to indicate the indirect object or the recipient of the action (to the client in this case).
Я позвонил клиенту, чтобы обсудить детали заказа.
I called the client to discuss the details of the order.
Here, 'клиенту' is also in the dative case, denoting to whom the letter was sent.
Мы отправили клиенту письмо с подтверждением.
We sent the client a confirmation letter.
In this sentence, 'клиенту' shows the indirect object experiencing the emotion or reaction towards the service.