Noah Webster
Keenness
KEE'NNESS, noun Eagerness; vehemence; as the keenness of hunger.
1. Sharpness; fineness of edge; as the keenness of a razor.
2. The quality of piercing; rigor; sharpness; as the keenness of the air or of cold.
3. Asperity; acrimony; bitterness; as the keenness of satire, invective or sarcasm.
4. Acuteness; sharpness; as the keenness of wit.