Origin

The character 軌 combines a wheel or cart on the left, which represents the basic concept of vehicles and paths, with a sound hint on the right that helps indicate how to pronounce it. The meaning developed from the physical rut or groove that a wheel makes when it rolls repeatedly over the same ground — the visible track left behind. From this concrete image of wheel tracks, the character extended to mean any kind of track, path, or established way of doing things, including the abstract sense of a model or standard way to follow.