retainer
US /rɪˈteɪ.nɚ/
UK /rɪˈteɪ.nɚ/

1.
zaliczka, honorarium
a fee paid in advance to someone, especially a lawyer, to secure or keep their services when required
:
•
The company paid a large retainer to the law firm.
Firma zapłaciła duży zaliczka kancelarii prawnej.
•
She works on a retainer basis for several clients.
Pracuje na zasadzie zaliczki dla kilku klientów.
2.