苦行(kŭ xíng) “religious austerity, difficult practices”
Cf. 難行(nán xíng); HD. 9.319a(百喩經); DK. 9.579d(資治通鑑); Krsh(1998) , s.v.;
ps-L. 35b22.釋迦如來於無量劫難行苦行，積功累德，求菩提(v.l. 薩[= J , FS etc.])道，未曾止息(p);
not found at K. 263.9; not found at Z. 106a4; STF. 197c23.勤苦;