妖 means “bewitching, supernatural, uncanny”

よう · you

Also: attractive, calamity

Kun'yomi (Japanese reading)
あやしい, なまめく, わざわい
On'yomi (Chinese reading)
ヨウ

JLPT N1 · Taught in secondary school · 7 strokes

The story

Picture a woman (女) with her head tilted (夭), smiling a little too sweetly: something not quite human. 妖 is the bewitching and uncanny: 妖怪 are Japan's folklore monsters, from kappa to one-eyed hopping umbrellas, and a 妖精 is a fairy.

Used in 妖怪 (youkai, folklore monster), 妖精 (yousei, fairy), and 妖艶 (youen, bewitching beauty)

More from Ghosts & Demons

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.