This is the 3357th most frequent Arabic word.
طهران
"طهران" is "Tehran," the capital city of Iran.
In this sentence, 'طهران' is used as a proper noun representing the capital city of Iran.
ذهبت إلى طهران الأسبوع الماضي.
I went to Tehran last week.
Here, 'طهران' is used to refer to the specific city in connection with its characteristics.
تتميز طهران بمناظرها الطبيعية الجذابة.
Tehran is distinguished by its attractive natural scenery.
In this case, 'طهران' is mentioned as the destination for tourists interested in its cultural and historical significance.