This is the 6737th most frequent German word.
european
The German word "europäisch" means "European," relating to Europe or its people.
In this sentence, 'europäischen' is an adjective modifying 'Nationen', describing their geographical and political association within Europe.
Die Europäische Union fördert die Zusammenarbeit zwischen europäischen Nationen.
The European Union promotes cooperation among European nations.
Here, 'europäischen' functions as an attributive adjective to 'Länder', qualifying which countries being referred to as belonging to Europe.
Die europäischen Länder sind bekannt für ihre kulturelle Vielfalt.
European countries are known for their cultural diversity.
In this example, 'Europäer' is a noun referring to an individual who identifies as a member of European heritage or nationality.