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

1.
مقدم أتعاب, رسوم احتفاظ
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.
دفعت الشركة مقدم أتعاب كبير لشركة المحاماة.
•
She works on a retainer basis for several clients.
تعمل على أساس مقدم أتعاب لعدة عملاء.
2.