coremechanism
nounUK /ˈkɔː ˈmekənɪzəm/
US /ˈkɔːr ˈmekənɪzəm/
The main part that makes something work.
The core mechanism of the clock is the tiny wheel that turns the hands.
OTHER MEANINGS
2. The most important way a machine does its job.
Engineers studied the core mechanism of the robot arm.
3. The basic rule that makes a plan or idea work.
Trust is the core mechanism of a good friendship.
4. The central part of a living thing that keeps it going.
The heart is a core mechanism for pumping blood.