This is the 11374th most frequent Russian word.
дизайнеру
The word "дизайнеру" means "to the designer" in English.
In this sentence, 'дизайнеру' is used in the dative case to indicate the recipient or beneficiary of the action.
Этот проект был поручен дизайнеру.
This project was assigned to the designer.
Here, 'дизайнеру' is also in the dative case, used for the indirect object of the verb 'посоветовать'.
Я посоветовал дизайнеру изменить макет.
I advised the designer to modify the layout.
In this sentence, 'дизайнеру' once again appears in the dative case, showing the allocation of something to the person.