Pictograph of a kneeling person smoothing out their unkempt hair with their hands. Based on the original meaning "conform, obey". The 口 (mouth) component was added later when the character became more abstract.
Oracle Bone~1250-1000 BCBronzeEarly Western Zhou~1000 BCBronzeLate Western Zhou~800 BCBronzeLate Western Zhou~800 BCBronzeLate Spring and Autumn~500 BCBronzeLate Warring States~250 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealShuowen~100 ADClericalQin221-206 BCClericalWestern Han202 BC-9 ADClericalWestern Han202 BC-9 ADClericalEastern Han25-220 ADRegularModern