This is the 11856th most frequent Russian word.
западного
"Западного" means "western" in English.
'западного' is used as an adjective to modify the noun 'подхода', meaning 'of the West' or 'Western'.
Я был удивлен культурой западного подхода.
I was surprised by the culture of the Western approach.
'западного' is used as an adjective to describe the origin of the wind, indicating it comes from the West.
Западного ветра мы не ожидали.
We did not expect the western wind.
'западного' modifies 'региона', specifying it relates to the western part or direction.