Synchromesh is a kind of car gearbox that makes it easy to change gears smoothly.
Synchromesh makes people think of cars and driving.
Examples:
My car has a synchromesh gearbox.
The synchromesh helps me change gears.
The synchromesh makes driving easier.
I wish all cars had synchromesh gearboxes!
With synchromesh, I can change gears like a race car driver.
The synchromesh is the best part of my car.