middleman
n. B2 Upper Intermediate US //ˈmɪdəɫˌmæn// UK //mˈɪdəlmˌæn// mid·dle·man
n. a person who acts as a link between two other people or groups. You use this when someone helps you buy or sell something without being the actual owner.
n. a person who acts as an intermediary between two parties in a transaction or negotiation. Often used in commercial contexts to describe a broker or agent.
The middleman helped us find a good deal on the car.
By using a middleman, the buyer and seller could negotiate the price without meeting each other directly.
The rise of digital marketplaces has significantly reduced the role of the traditional middleman, allowing producers to reach consumers through direct online channels.
From Middle English myddil man, equivalent to middle + man.