U+5380 "厀" CJK Unified Ideograph-# Unicode Character

U+5380 "厀" CJK Unified Ideograph-# is a Han character that historically functions as a variant of the Chinese character for "knee" (膝), often used in classical or literary contexts rather than in modern standard Chinese. It appears in ancient texts and calligraphy, where it represents the same meaning of the knee joint. This character is composed of the radical for "cliff" or "factory" (厂) on the top, which in this case serves as a phonetic or structural component, and the lower part "卩" (a seal-like shape) contributing to the overall form. While not common in everyday writing, it is recognized in the Unicode standard to preserve historical and regional script variations.