一切經音義 75.307

75.307

發軫（之忍反軫跡也轉也展也考工記車軫四尺注云輿後橫木也今謂發車轉也）。

Fazhen 發軫 (pronounced 之忍 [zhǐn]). 軫 means tracks; it also means to turn, or to spread out. The Kaogong ji says: 'The crossbeam (zhen) of a carriage is four chi.' The commentary says: 'The horizontal timber at the rear of the carriage body.' Here it refers to setting a carriage in motion and turning [its wheels].