firm的派生詞

英語中firm可以充當名詞，意思是公司，相當於company，firm也可以做形容詞，意思是堅定的，它的副詞是 Firmly，意思是堅定地。

例如

The boy told me in a firm voice that he would go to the Great Wall next year.

I firmly believe that you will make progress in your English if you study very hard.