Explore each form from the oldest known stage to today.
The character 脊 (jǐ) originally depicted a human spine and ribs, representing the backbone. In its earliest oracle bone script forms, it showed vertebrae running down the center with rib-like structures extending outward. Over time, the character evolved through bronze script and seal script periods, gradually simplifying while maintaining the essential concept of the spinal column. The modern form combines the 'meat/flesh' radical (月) with what resembles a stylized spine. The character's meaning extends metaphorically to concepts of backbone, ridge, and core structural elements in various contexts. Arrived in Japan: The character 脊 arrived in Japan during the 5th-6th centuries CE, likely as part of the broader introduction of Chinese writing system through Buddhist texts and cultural exchange. It was incorporated into the Japanese writing system as a kanji character, retaining its meaning related to the spine or backbone, and is used in words like 脊髄 (sekizui - spinal cord) and 脊椎 (sekitsui - spine/vertebra).