rough
The German word 'rau' is an adjective that is used to describe a surface or texture that is uneven, coarse, or not smooth. It can also be used to describe a person's voice or manner as harsh or gruff. In English, 'rough' is often used in the same way to describe something that is not smooth or even, or a person who is not gentle or refined.
The climate here is very harsh.
This sentence is using 'rau' to describe the harshness of the weather or climate. It is used in contexts where the weather conditions are extreme and uncomfortable.
His skin feels rough.
In this sentence, 'rau' is used to describe a physical texture, in this case the roughness of someone's skin. Typically it's used when the skin is not smooth, maybe due to dryness or a medical condition.
He has a rough voice.
Here, 'rau' describes the quality of someone's voice. A 'rau' voice means a voice that sounds scratchy, husky, or not smooth, often caused by excessive use or illness.