This is the 968th most frequent German word.
wirtschaftlichen
The German word "wirtschaftlichen" means "economic" or "related to the economy" in English.
Here, 'wirtschaftlichen' is an adjective describing 'Beziehungen' (relations), elucidating that the relations are of an economic nature.
Die wirtschaftlichen Beziehungen zwischen den Ländern haben sich verbessert.
The economic relations between the countries have improved.
In this sentence, 'wirtschaftlichen' again functions as an adjective, qualifying 'Vorteile' (advantages), emphasizing the economic benefits provided by the technology.
Er schilderte die wirtschaftlichen Vorteile der neuen Technologie.
He described the economic benefits of the new technology.
Here, 'wirtschaftlichen' describes 'Probleme' (problems), indicating that the problems are related to the economy.