U+FA42 "既" CJK Compatibility Ideograph-# Unicode Character

U+FA42 "既" CJK Compatibility Ideograph-# is a compatibility ideograph used in the CJK (Chinese, Japanese, and Korean) block, specifically encoded to represent a variant or simplified form of the standard CJK unified ideograph U+65E2 "既," which means "already," "since," or "previously." This character was included in Unicode primarily to maintain round-trip compatibility with older East Asian character encoding standards, such as certain Japanese industrial standards (JIS), where it appeared as a distinct glyph variant. Its usage is largely historical or specialized, as it is not typically employed in modern writing systems, but it ensures that legacy text data can be correctly represented without loss of information when converted to Unicode.