For physical sharpness:
* Sharpen: This is the most common verb used for making something physically sharper, like a knife or pencil.
* Whet: This verb is often used for sharpening something, especially a blade. It also suggests the act of making something more eager or keen.
* Edge: This verb means to give something a sharp edge.
* Point: This verb is used to make something pointed or sharp.
For sharpness of wit or intelligence:
* Cut: This verb implies quick wit and sharp thinking.
* Pierce: This verb suggests a sharp insight that penetrates through to the core of something.
* Penetrate: This verb also suggests a deep understanding or insight.
* Satirize: This verb means to make fun of something in a sharp and witty way.
For sharpness of senses:
* Keen: This verb describes a heightened sense of hearing, smell, or sight.
* Discern: This verb means to perceive something clearly or sharply.
Ultimately, the best verb to use will depend on the specific context and the type of sharpness you want to convey.