A Dowery or Nedunya is money or property brought by a woman to her husband at the time of marriage, generally provided by the parents of the bride.

Dowry Deferral Fee A father-in-law that wants to pay an annual fee in return for the ability to delay the giving of the dowry: - When the condition is laid out at the creation of the marital contract, it's deemed acceptable and does not constitute interest - ribbis. This is due to the absence of any payment obligation at that stage and since everything is being agreed upon simultaneously, it is just considered a dowry increase. - However, if the condition is imposed at a subsequent stage, it is seen as interest - ribbis. The rationale for this categorization is that the fee serves as a compensation for postponing a payment that is already obligatory.[1]

[1] Kitzur Shulchan Aruch 63:23