agent

Someone who acts for another person or organization, often arranging business or making decisions.

• Call your travel agent.
• His agent arranged the film contract.
• The insurance agents answered our questions.

How to use it: agent for someone/something (She works as an agent for several musicians.)

Similar words: representative

Common phrases: estate agent, travel agent, agent for someone

A substance or force that causes a change or produces an effect.

• Soap is a cleaning agent.
• The laboratory identified the infectious agent.
• Wind acts as an agent of erosion.

Similar words: cause

Common phrases: cleaning agent, infectious agent, agent of change

A person or being able to act and make choices that affect things.

• A moral agent can make choices.
• The theory treats each person as an independent agent.
• Are animals responsible agents in the same way humans are?

Similar words: actor

Common phrases: moral agent, rational agent, free agent