How to Use "keenness" with Example Sentences

1. His headache has departed ; his every sense seem to have gained keenness .

2. The scabbard is content to be dull when it protects the keenness of .

3. His headache had departed ; his every sense seemed to have gained keenness .

4. The razor-blade is proud of its keenness when is sneers at the sun .

5. The scabbard is content to be dull when it protects the keenness of the sword .