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The character 関 is a simplified variant of 關, denoting a mountain pass, barrier, or the act of closing. It combines the semantic radical 門 (doorway) with the component 关, which serves as a phonetic element and also carries meanings of shutting or connecting. The traditional form 關 uses a more intricate inner component, 𢇇, originally depicting loom threads and shuttles, a concept extended to a gate’s locking mechanism. The variant 関 streamlines this inner structure into a simpler form, while preserving the core ideas of a physical threshold, a key checkpoint, or the secure closing of an entrance.