gearwork
nounUK /ˈɡɪəwɜːk/
US /ˈɡɪrwɜːrk/
Gearwork is all the wheels with teeth that turn together inside a machine.
The old clock stopped because a piece of dust got stuck in its gearwork.
OTHER MEANINGS
2. The act or job of fitting gears into a machine.
The mechanic spent the afternoon on the gearwork of the tractor.
3. The way parts of a system work together like gears.
The gearwork of the school schedule keeps every class running on time.
4. The inner parts of a device that make it move.
He opened the toy robot to look at its tiny gearwork.