U+5C9F "岟" CJK Unified Ideograph-# Unicode Character

U+5C9F "岟" CJK Unified Ideograph-# is a rare and archaic Chinese character that belongs to the set of East Asian ideographs encoded in the Unicode Standard. Its primary meaning relates to a steep mountain or a deep valley, often described in classical texts as a rugged or precipitous landform. Composed of the radical "山" meaning mountain, combined with a phonetic component, this character is seldom used in modern Chinese, Japanese, or Korean writing systems, appearing mostly in ancient literature, place names, or specialized lexicons. Its encoding ensures that historical and linguistic documents can be digitally preserved and accurately rendered across platforms.