Origin

The character 堅 combines earth or soil (土) at the bottom with a sound component (臤) at the top that hints at the pronunciation. Since earth and soil are literally solid and hard materials, the lower part carries the core meaning. The top component provides a clue to how the character should be pronounced in Chinese-derived Japanese. Together, the shape represents something solid and unyielding, which is why it means hard, solid, or tough—qualities associated with packed earth and stone.

AI-generated (claude-haiku-4-5), not yet reviewed. Formation type (automated guess): Phono-semantic (meaning + sound hint).