A sharp edge or ridge formed by the intersection of two surfaces
A ridge formed on the surface of flaked stone, such as a arrowhead or hand axe, as the result of the intersection of two or more flake removals.
A sharp edge or ridge formed by the intersection of two curved surfaces
Buttocks, arse.
An area that protrudes from a surface.
The quality of being harsh or severe in the way one speaks or behaves toward people.
A section of a fault line with high friction, such that there is no movement along this part of the fault except during an earthquake.
The quality of being difficult or unpleasant to experience.
The quality of having a rough or uneven surface.
Something that is harsh and difficult to endure.