Knurl (noun)

1. A pattern of small ridges or grooves on a surface, used to increase grip or as a decorative element.
2. A series of ridges or rough textures on a surface that increase friction.

Origin:

The origin of the word knurl is uncertain, but it refers to a pattern of raised lines or ridges on a surface.

Examples:

1. The knurl on the edge of the coin made it easy to grip.
2. The knurl on the screwdriver handle provided a better grip for tightening screws.
3. The knurl pattern on the metal ring added an interesting decorative element.
4. The knurl on the bottom of the glass prevented it from sliding on the table.
5. The knurl on the steering wheel made it easier to control the car.