[牢固](láo gù) “firm, firmness”
HD. 6.242a(三國志); DK. 7.629d(顔氏家訓);
83a21.佛爲大王 無漏最勝 堪任堅強 常修牢固(v)
K. 120.2.-.; cf.Krsh. 91; not found at L. 19a5;