n.堅(jiān)固；堅(jiān)牢；堅(jiān)定

In the early days of the war, the problem of India's independence became a touchstone for checking the ally's degree of firmness. 戰(zhàn)爭初期出現(xiàn)的印度獨(dú)立問題成為試探英美同盟堅(jiān)固程度的試金石。

His firmness on his belief supported him in difficulties. 困境中，他堅(jiān)定的信仰支撐著他。