This is the 3698th most frequent Arabic word.
الايرانية
"The Iranian."
Here, 'الإيرانية' is used as an adjective describing the noun 'music'.
الموسيقى الإيرانية معروفة بجمالها.
Iranian music is known for its beauty.
In this sentence, 'الإيرانية' modifies the noun 'religions', specifying their origin.
درست الأديان الإيرانية في الجامعة.
I studied Iranian religions at university.
This usage shows 'الإيرانية' as an adjective characterizing the noun 'villages'.