pur
pure
Pure, unmixed, or unadulterated. It describes something in its pure form, without additives.
Er trinkt seinen Whisky am liebsten pur.
He likes to drink his whisky neat.

pure
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pure
Pure, unmixed, or unadulterated. It describes something in its pure form, without additives.
Er trinkt seinen Whisky am liebsten pur.
He likes to drink his whisky neat.

Unlike most adjectives, 'pur' (pure) almost always stands unchanged after the noun it describes. It is not declined.
Ich trinke meinen Kaffee am liebsten schwarz und pur.
I like to drink my coffee black and pure.
If 'pur' (pure/neat) refers to a drink or food, it means 'unmixed.' If it refers to an experience or feeling, it means 'nothing but' and serves as emphasis.
Möchtest du den Saft pur oder mit Wasser verdünnt trinken?
Would you like to drink the juice pure or diluted with water?
For emotional emphasis, 'pur' (pure/sheer) is often combined with abstract nouns that describe a strong experience. Popular expressions are 'Adrenalin pur' (pure adrenaline), 'Natur pur' (pure nature), or 'Gänsehaut pur' (pure goosebumps).
Die Aussicht vom Berggipfel war einfach nur Natur pur.
The view from the mountain peak was simply pure nature.
only
'nur' and 'pur' can both express that nothing else is added. 'nur' limits a statement: it means 'not more than' or 'exclusively'. 'pur' more often describes that something is pure, unmixed, or consists entirely of one thing. Learners may confuse the words because both can sometimes seem like 'nothing but'. For quantities, people, or limitations, you usually use 'nur'. For taste, material, or strong emphasis on purity, 'pur' fits better.

In der Küche trinkt Paul den Kaffee pur, ohne Milch und Zucker.
In the kitchen, Paul drinks his coffee black, without milk or sugar.
Am Bahnhof wartet das Team nur zehn Minuten auf den Zug.
At the station, the team waits only ten minutes for the train.