sharpen
shar·pen
verb
4.
Origin
From Middle English scharpenen, scharpnen, equivalent to sharp + -en.
Phrases
- sharpen up
Related words
Broader terms
Causes
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.