холодильника

This is the 18116th most frequent Russian word.

холодильника

"Refrigerator" (genitive singular form).

Here, 'холодильника' is used in the genitive case to indicate possession ('the door of the refrigerator').

Я открыл дверцу холодильника.

I opened the door of the refrigerator.

In this instance, 'холодильника' is used in the prepositional case, modified by the preposition 'на' to denote location ('on the refrigerator').

На холодильника была наклейка.

There was a sticker on the refrigerator.

Here, 'холодильника' is used in the genitive case again to describe the source ('products of the refrigerator').

Я готовлю еду из продуктов холодильника.

I am cooking food from the products of the refrigerator.