This is the 4802nd most frequent German word.
aare
Aare: A river in Switzerland.
Here, 'Aare' is used as a proper noun, referring to the river in Switzerland.
Die Aare fliesst durch die Stadt Bern.
The Aare flows through the city of Bern.
In this sentence, 'Aare' refers to the location by the river, showing its use in place description.
Ich habe gestern an der Aare ein Picknick gemacht.
Yesterday I had a picnic at the Aare.
Here, 'Aare' denotes the body of water whose temperature is being described.