一切經音義 74.17

74.17

不躅（又作䠱同馳錄反漢書音義曰軌躅迹也三輔謂牛蹄處為躅也）。

不躅 (Does not tread/leave tracks; also written 䠱, pronounced the same; [fanqie:] chi + lu. The Hanshu yinyi says: "Tracks and footprints are called zhú." In the Sanfu region, places where cattle's hooves tread are called zhú).