於

yū, wū

仒 + 方

yū (preposition) in; at; to; from

wū (interjection) oh!; ah!

Originally a variant form of 烏, which is a pictograph of a crow. The current use as a function word is a phonetic loan.

Bronze Early Western Zhou (~1000 BC)

Bronze Late Western Zhou (~800 BC)

Bronze Mid Spring and Autumn (~600 BC)

Bronze Late Spring and Autumn (~500 BC)

Bronze Mid Warring States (~300 BC)

Seal Chu (Warring States: 475-221 BC)

Seal Shuowen (~100 AD)

Clerical Qin dynasty (221-206 BC)

Traditional Modern

Simplified Modern

Composed characters:

Component: 仒