Adapted from the cursive form of the traditional character 義. Phonosemantic compound. 羊 represents the meaning and 我 represents the sound. In ancient China sheep (羊) were associated with goodness and beauty, which is why 羊 is a component in characters like 美 (beautiful), 善 (benevolent), and 義 (justice).

Evolution

Oracle script

(~1250-1000 BC)

Bronze script

Early Western Zhou (~1000 BC)

Seal script

Shuowen (~100 AD)

Clerical script

Western Jin dynasty (266-316 AD)

Traditional script

Modern

Simplified script

Modern

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