Depicts a person (大) with a horn (角) on their head, indicating an unbalanced single horn as opposed to a balanced pair of horns. 行 represents the sound. The meaning later shifted to "to weigh" and "measure".

Evolution

Bronze script

Late Western Zhou (~800 BC)

Seal script

Shuowen (~100 AD)

Clerical script

Qin dynasty (221-206 BC)

Regular script

Modern

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