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The character "圄" is structured with the enclosing radical "囗" surrounding the component "吾", a formation that directly indicates its original association with confinement, as the outer element symbolizes a boundary or prison. Etymologically, "吾" primarily served a phonetic role within this composite, lending its sound to the character while the semantic focus remained on the concept of imprisonment conveyed by the enclosure. Initially functioning as an independent term for prison or the act of incarcerating, over centuries its standalone usage declined, and it became entrenched in the compound "囹圄", where it contributes to the meaning of captivity, reflecting a shift from a broader lexical item to a more specialized one.
Etymology Hide
