A more thorough explanation:

Brocarius

Brocarius is a historical term that refers to a middleman who helps buyers and sellers make deals. They are also known as brokers.

During the medieval period, brocarius played an important role in trade. For example, if a merchant wanted to buy spices from another country, they would hire a brocarius to help them find a seller and negotiate a fair price. The brocarius would then take a commission for their services.

In modern times, brokers still exist in various industries such as real estate and finance. For instance, if someone wants to buy a house, they might hire a real estate broker to help them find a suitable property and negotiate with the seller.

These examples illustrate how brocarius acted as intermediaries between buyers and sellers, helping them to make deals and facilitating transactions.