苦行(kŭ xíng) “religious austerity, difficult practices” Cf. 难行(nán xíng);
HD. 9.319a(百喩经); DK. 9.579d(资治通鉴); Krsh(1998) , s.v.;
ps-L. 35b22.释迦如来于无量劫难行苦行，积功累德，求菩提(v.l. 萨[= J , FS etc.])道，未曾止息(p);
not found at K. 263.9; not found at Z. 106a4; STF. 197c23.勤苦;