This is the 1552nd most frequent Spanish word.
alemán
German.
Here, 'alemán' is a noun, referring to a person from Germany.
El alemán estaba sentado cerca de la ventana.
The German man was sitting near the window.
In this sentence, 'alemán' is used as an adjective to describe something as being from Germany, in this case, the watch.
Ella compró un reloj alemán muy elegante.
She bought a very elegant German watch.
Here, 'alemán' refers to the German language.