中英成语俚语800对169：固若金汤
固若金汤
as firm as a rock.
eg：he will stick to his stand which is as firm as a rock.
中英俚语俗语来源：汉书："皆为金城汤池，不可攻也。 "
同义词：安如泰山 safe upon the solid rock.
反义词：不堪一击 the earthen pot must keep clear of the brass vessel.