noun
mediator; go-between; middleman
A person who acts as an intermediary between two parties, often in negotiations, transactions, or disputes.
彼は両者の仲介者として交渉をまとめた。
He brought the negotiations to a conclusion as a mediator between the two parties.
不動産の売買では仲介
In real estate transactions, a middleman often steps in.
仲裁者 emphasizes resolving a dispute or conflict, often with authority, whereas 仲介者 is a broader term for any intermediary.
Compound of 仲介 (mediation) + 者 (person). The exact historical derivation is straightforward; the word follows a common pattern for agent nouns.