This is the 875th most frequent Arabic word.
الشمالي
"الشمالي" means "northern" in English.
Here, "الشمالي" describes the geographical position of a part of the city relative to other areas.
يسكن يوسف في الجزء الشمالي من المدينة.
Yousef lives in the northern part of the city.
In this sentence, "الشمالية" qualifies "الرياح" to specify its origin from the north.
الرياح الشمالية باردة في فصل الشتاء.
The northern winds are cold in the winter.
"الشمالية" attributes the region of the country to indicate its direction and position in an enjoyable context.