This is the 2165th most frequent Turkish word.
kilis
Kilis: A city in southern Turkey near the Syrian border.
In this sentence, 'Kilis' refers to the proper noun, which is the name of a city in Turkey.
Kilis güzel bir şehirdir.
Kilis is a beautiful city.
Here, 'kilis' is used as a root related to 'church', reflecting a connection to Christian places of worship.
Eski kilis çanları hala çalıyor.
The old church bells are still ringing.
In this usage, 'kilis' modifies 'duvarları', indicating the walls belonging to a church structure.