palace corridor or passageway
壼 centers on a covered passageway within a palace: a corridor or hallway that connects rooms, often with a sense of enclosure.
壼 is a rare character combining 士 (scholar/official) and 冖 (cover) with 亞, which may relate to a secondary or inner structure, suggesting an inner palace corridor. The exact historical development is uncertain.
Under the cover 冖, a scholar 士 walks through the inner palace 亞, moving along a long corridor.
For コン, imagine a con artist sneaking through the palace corridor: con -> コン, and the passageway echoes with footsteps.
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