Countersink (verb)

To make a hole in a surface that is slightly wider at the top than the bottom, typically used to create a flush surface for a screw or bolt head.

Origin:

Derived from the phrase "counter sink" meaning to cut a hole in a surface that is slightly wider at the top than the bottom.

Examples:

1. The carpenter countersunk the screws to ensure a flush surface.
2. The mechanic countersunk the bolts to keep the engine cover in place.
3. The machinist countersunk the holes for the gears to fit properly.
4. The electrician countersunk the holes for the light switches to be flush with the wall.
5. The woodworker countersunk the holes for the legs of the table to be flush with the surface.