steadfast

详细解释:a. 坚定的, 踏实的, 固定的, 不变的

词型变化：

副词:steadfastly名词:steadfast-ness

英语解释：

形容词 steadfast:

marked by firm determination or resolution; not shakable同义词：firm, steady, stiff, unbendable, unfaltering, unshakable, unwavering