This is the 896th most frequent Arabic word.
خارجية
"خارجية" means "external" or "foreign."
In this sentence, "خارجية" refers to matters or policies that pertain to international relations or dealings between countries, associated with the word "العلاقات (relations)."
الطالب مهتم بالعلاقات الخارجية بين الدول.
The student is interested in international relations between countries.
Here, "خارجية" describes the lights of the car, indicating they are on the outside/exterior of the vehicle.
السيارة الجديدة لديها أضواء خارجية قوية.
The new car has strong exterior lights.
In this context, "خارجية" indicates areas located in the external parts of the forests.