rock-solid
形容詞
UK/ˌrɒkˈsɒl.ɪd/
US/ˌrɑːkˈsɑː.lɪd/
定義 rock-solid 形容詞
unlikely to move, break, or fail; extremely stable or reliable.
Their relationship is rock-solid, having stood the test of time.
The company's financial situation is rock-solid.
After thorough testing, the software's stability is rock-solid.