This is the 17593rd most frequent Russian word.
тунисской
Tunisian (adjective, relating to Tunisia).
Here, 'тунисской' is used as an adjective to describe the noun 'газете' ('newspaper'), indicating it originates from Tunisia.
Я прочитал статью в тунисской газете.
I read an article in a Tunisian newspaper.
In this sentence, 'тунисской' serves as an adjective modifying 'кухни' ('cuisine'), specifying its cultural origin related to Tunisia.
Мы попробовали блюда тунисской кухни.
We tried dishes of Tunisian cuisine.
The word 'тунисской' is functioning as an adjective describing 'архитектурой' ('architecture'), indicating the style is characteristic of Tunisia.