faithfully名词是faithfulness。用法：faithfulness to sb意思是对某人的忠心；对某人的忠诚准确；精确；忠实。

Faithfully是一个英文单词，副词。

1、忠实地；如实地

Their activities were faithfully described in the newspaper.

他们的行动被如实地记载在报纸上。

2、准确地

I copied the map faithfully.

我准确地复制了这张地图。