flywheel

noun
UK /ˈflaɪ.wiːl/
US /ˈflaɪ.wiːl/

A flywheel is a heavy wheel that keeps a machine spinning smoothly.

The old steam engine used a big flywheel to keep running steadily.


OTHER MEANINGS

2. A person or thing that provides stability or continuity in a system or organization.

She was the flywheel of the team, keeping everyone focused during tough times.

3. In business, a self-reinforcing cycle in which success in one area fuels growth in another.

The company's marketing flywheel turned happy customers into new customers.

4. A heavy wheel used in vehicles to store rotational energy and smooth out engine power delivery.

The mechanic replaced the worn flywheel to fix the car's rough shifting.