Depicts a hand (又) sharpening a knife (刀) on a stone (石). Based on the original meaning "whetstone", now written as 碬. The current meaning is a phonetic loan.
BronzeMid Western Zhou~900 BCBronzeLate Western Zhou~800 BCBronzeEarly Spring and Autumn~700 BCBronzeEarly Spring and Autumn~700 BCSealShuowen~100 ADSealShuowen~100 ADSealShuowen~100 ADClericalQin221-206 BCClericalWestern Han202 BC-9 ADRegularModern