put (money) down
Definition: to pay part of the cost of something as a deposit or in order to reserve it.
(This phrasal verb has more than one meaning)
E.g.1: When you book a holiday, you often have to put a deposit down. If you decide not to go on the holiday, you don’t have to pay the rest of the money, but the company will keep the deposit.
E.g.2: She liked the flat and decided to put some money down so that no one else would take it.
This phrasal verb can be separated. (E.g. 1 and 2)