A brothel is a place where people can buy sex. It can be any kind of business, from a small house to an entire building.
When you go to a laundromat, you load your laundry into the machine and it gets cleaned. Laundromats are usually very close to where people live, so it's a convenient way to do laundry.
To launder something is to clean it so that it is free of dirt and stains. You can launder clothes, sheets, or anything else that needs to be cleaned.
The darknet is a network of computers that are not usually accessible to the public. It is usually used for illegal activities, such as buying and selling drugs and weapons.
A tradable good is something that can be traded on the market. This means that there is a lot of demand for it, and it can often be sold at a higher price than other goods.
Exorbitant means very high in price. The salary for the position is exorbitant, and it's far beyond what is reasonable.
To confiscate something is to take it away from someone. The government can confiscate weapons or drugs that they believe are dangerous.
To be laundered is to be cleaned and cleaned thoroughly. You might say that someone is laundered when they come back from a trip, or when they get their house cleaned.