[牢固](láo gù) “firm, firmness”
HD. 6.242a(三国志); DK. 7.629d(颜氏家训);
83a21.佛为大王 无漏最胜 堪任坚强 常修牢固(v)
K. 120.2.-.; cf.Krsh. 91; not found at L. 19a5;