- shadowy (adj.)
[shadowy 词源字典]
- late 14c., shadewy, "full of shadows," also "transitory, fleeting, unreal;" see shadow (n.) + -y (2). From 1797 as "faintly perceptible." Related: Shadowiness. Old English had sceadwig "shady."[shadowy etymology, shadowy origin, 英语词源]