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The character "跏" is structurally composed of the semantic component "足", indicating a relation to the foot, combined with the phonetic component "加" which cues its pronunciation. This formation originally implied a general connection to foot posture or movement, but its application later specialized to denote solely the cross-legged sitting position in the compound "跏趺", a term central to Buddhist meditation, thus refining its semantic scope from a broader conceptual field to this specific ritual context.