effigy
俑 centers on a human-shaped figure used as a substitute or representation, especially a burial effigy. The meaning is narrow and concrete.
俑 combines 亻 (person) with 甬, which likely contributes the sound. The character originally referred to wooden or clay human figures buried with the dead.
A person 亻 beside 甬, a shape that suggests a hollow figure. Imagine a human-shaped clay effigy standing in a tomb.
For ヨウ, picture a yōkai (妖怪) spirit inhabiting the effigy: yō -> ヨウ, and the figure comes to life.
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