1ADJ 非常坚硬的 Something that is rock-solid is extremely hard. 非常坚硬的
Freeze it only until firm but not rock solid.
把它冻硬,但是不要硬得像石头一样。
2ADJ 十分可靠的;可信赖的;不易改变的 If you describe someone or something as rock-solid, you approve of them because they are extremely reliable or unlikely to change. 十分可靠的;可信赖的;不易改变的 [approval]