This is the 9827th most frequent German word.
nissan
"Nissan" is not a German word; it is a brand name for a Japanese automobile manufacturer.
In this sentence, 'Nissan' is used as a proper noun referring to a specific car brand and likely a car owned by the speaker.
Ich liebe meinen Nissan, mit dem ich viele Abenteuer erlebt habe.
I love my Nissan, with which I have experienced many adventures.
Here, 'Nissan' refers to a car model or vehicle being promoted in marketing material.
Der Nissan im Prospekt sieht sehr modern und sportlich aus.
The Nissan in the brochure looks very modern and sporty.
In this sentence, 'Nissan' is used to refer to a vehicle of the Nissan brand observed by the speaker.