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As a phono-semantic compound, 岽 consists of the semantic radical 山 (mountain) atop the phonetic component 东 (east, dōng). Its traditional form, 崬, uses 東 in the lower position. The character’s usage is highly specialized, appearing almost exclusively in place names and topographical terms, particularly in certain southern Chinese dialects. Functioning as a localized geographic marker for a mountain or ridge, it lacks a general lexical definition and is seldom found outside regional or cartographic contexts.