This is the 7640th most frequent Russian word.
женевским
"Женевским" means "Genevan" (relating to Geneva).
The word 'женевским' is used here as an adjective in the instrumental case, describing the noun 'озером' (lake), indicating something associated with or related to Geneva.
Я всегда мечтал увидеть Женевским озером с высокого берега.
I have always dreamed of seeing Lake Geneva from a high shore.
In this sentence, 'женевским' is in the instrumental case, modifying 'видом' (view), showing that it is related to Geneva.
Мы восхищались женевским видом на горы.
We admired the Geneva view of the mountains.
Here, 'женевским' serves as an adjective in the instrumental case, describing 'искусством' (art), signifying its relation to Geneva.