To deal in
Example: They deal in financial instruments
Definition
"To deal in" means to engage regularly in the trade, sale, or exchange of particular goods or services, often as a business activity. For example, when someone deals in financial instruments, they buy and sell these assets professionally.
Etymology
The phrase "to deal in" comes from the verb "deal," which originates from Old English "dǣlan," meaning to divide or distribute. Over time, it evolved to mean conducting business or trading. The addition of "in" specifies the particular goods or services involved. Did you know? The term "deal" in trading contexts has been used since the 14th century.