dark 与darkness的区别？

区别就是darkness是形容词dark的名词形式，词根dark+后缀ness，中文意思是n. 黑暗；深色，暗色；邪恶，罪恶

例如

The darkness had disorientated him.黑暗使他迷失了方向。

A voice boomed out from the darkness.黑暗中传来低沉有力的嗓音。

He was sitting alone in the darkness.