Pictograph of a blade for cutting trees. Original form of 柞. The current meaning is a phonetic loan.
Character Evolution
Oracle Bone~1250-1000 BCOracle Bone~1250-1000 BCOracle Bone~1250-1000 BCBronzeLate Shang~1100 BCBronzeEarly Western Zhou~1000 BCBronzeEarly Western Zhou~1000 BCBronzeEarly Western Zhou~1000 BCBronzeSpring and Autumn771-476 BCBronzeSpring and Autumn771-476 BCBronzeLate Spring and Autumn~500 BCBronzeEarly Warring States~400 BCBronzeLate Warring States~250 BCBronzeLate Warring States~250 BCSealLate Spring and Autumn~500 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealShuowen~100 ADClericalJin266-420 ADRegularModern