# รอก
## Noun (N)
### Sense: a pulley on a shaft that presses against a guide belt to guide or tighten it
- idle pulley
- idler pulley
- idle wheel
### Sense: a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
- pulley
- pulley-block
- pulley block
- block