Origin

This character combines "flesh" (the left component, which appears in many body-part kanji) with a phonetic element on the right that hints at the pronunciation. The pairing makes sense because the knee is literally a joint of flesh and bone. Over time, the character came to represent not just the physical knee itself, but also the lap—the area where the knee and thigh meet when sitting—which shares the same Japanese word, ひざ.

AI-generated (claude-haiku-4-5), not yet reviewed. Formation type (automated guess): Pictographic or simple.