agent

The word “agent” means a person who acts on behalf of another, especially in business or legal matters. In plain terms, someone (or something) that acts, especially on behalf of someone else, or a substance that causes an effect.

“Agent” is pronounced AYD-zhuhnt (/ˈeɪ̯d͡ʒənt/ in IPA).

Here is “agent” used in a sentence: “Her literary agent negotiated the book deal.”

Words with a similar meaning to “agent” include actor and performer.

The opposite of “agent” — its antonyms — are patient, recipient and undergoer.

“Agent” is a noun.

The word “agent” comes from Latin. From Latin agens, the present participle of agere ("to do, act, drive").

“Agent” is a very common word in modern English, usually learned at around the A2 level.

Both act as intermediaries, but the roles differ. An agent represents and acts in the interests of one party, such as a seller or an author. A broker arranges deals between two parties without permanently representing either, matching buyers with sellers. In short, agents take sides; brokers connect them.

There are many kinds. Estate agents sell property, literary and talent agents represent authors and performers, and travel agents book trips. Insurance and sports agents negotiate on a client's behalf, while business agents handle commercial dealings. In each case, the agent acts for someone else's interests.

Beyond a person acting for others, agent can mean a substance that produces an effect — a cleaning agent or chemical agent. In computing, a software agent performs tasks automatically. It can also mean a spy or secret agent. The common thread is something that acts or brings about a result.