General terms:
* Tapering: This is a very general term that describes a gradual decrease in width or thickness from one end to another.
* Narrowing: This emphasizes the reduction in width, but doesn't specify the shape of the change.
* Conical: This describes a shape that is wider at one end and narrows to a point at the other, like a cone.
* Beveled: This describes a slanted edge, usually created by cutting away a corner at an angle.
* Sloped: This term is more general and can refer to a variety of gradual slopes, including a narrowing one.
Specific terms:
* Wedge-shaped: This describes a shape that is wider at one end and tapers to a point at the other, like a wedge.
* Spatulate: This describes a shape that is broad and flat at one end and gradually narrows to a point at the other, like a spatula.
* Oval: This describes a shape that is rounder at one end and narrows to a point at the other.
It's important to consider the specific shape and context to choose the most appropriate term. For example, if you are describing a piece of wood that is being shaped for a door, you might use the term "tapering" or "narrowing." But if you are describing a piece of art that is shaped like a cone, you would use the term "conical."