wrist
The German word for wrist is 'Handgelenk'. It is used in the same context as in English, referring to the joint between the hand and the forearm. In German, the word is a compound noun, combining 'Hand' (hand) and 'Gelenk' (joint).
I sprained my wrist.
This sentence is used when someone injures their wrist area, and specifically sprains it.
He wears a watch on his wrist.
This phrase could be used to describe a person's daily accessory or attire such as a wristwatch.
Her wrist is very thin.
In this context, the phrase is looking at the physical aspect of someone's wrist, specifically noting that it's thin.