Fortochka

Fortochka is a Russian word that means "little window". It is a small opening or a peephole in a door or a wall that can be used to look through or to communicate with someone on the other side.

Imagine you are playing hide-and-seek with your friends and you need to find them. You come across a door that has a little window. You peek through the window and see your friends hiding behind the door. You can now communicate with them and ask them to come out of hiding.

Fortochka is very useful in many situations. For example, it can be used in a prison cell so that the guards can check on the prisoners without having to open the door. It can also be used in a house to check who is at the door before opening it.

Overall, fortochka is a small and handy feature that can be used to peek through or communicate with someone on the other side of a door or a wall.