Definition

A device that helps to make something go faster, like the pedal in a car that controls how quickly it moves. It can also refer to a substance in chemistry that speeds up a chemical reaction or a machine that speeds up particles in physics.

Example

He pressed the accelerator to speed up the car.

Conversation

Have you ever driven a car with a really responsive accelerator?

Yeah, it's amazing how quickly you can pick up speed!

I know! It feels like you’re flying when you press the accelerator.

Totally! It makes driving so much more fun.

Synonyms & Antonyms

Root Explanation

Accelerator → It is formed from "ad-" (meaning to) and "celerare" (meaning to hasten or speed up). The word "accelerator" refers to something that causes an increase in speed or hastens a process.

Memory Tip

Think of something that helps you 'speed up' ('celerare') as you move 'toward' ('ad-') your goal — that's what an accelerator does.

Visually Confused Words