Definitions

yōu (particle) oh! (exclamation of surprise or dismay)
yōu (particle) (onom.) sound of deer; sound of birds

Etymology phono-semantic

mouth

Semantic: Phonetic:

About

is a phono-semantic compound character: the left-side radical means mouth, so the character relates to a vocalization or sound, and the right-side component (young) functions as the phonetic marker giving the pronunciation "yōu". In classical literature, particularly in the canonical Book of Songs, appeared as a specific onomatopoeia for the bleating of deer calling to each other in the wilderness. In contemporary Chinese, it has transitioned into an interjection used to express mild surprise, sudden realization, or minor distress, now functioning as an emotional particle in casual speech rather than a literal animal sound.

Etymology Hide

Seal etymology image
Seal Shuowen (~100 AD)
Seal etymology image
Seal Shuowen (~100 AD)
Traditional Modern
Simplified Modern