This is the 13571st most frequent Turkish word.
kullanmayan
"Not using" or "unused."
Here, 'kullanmayan' is part of a descriptive clause referring to someone who does not use something.
Yeni bilgisayarını kullanmayan birini tanıyorum.
I know someone who doesn't use their new computer.
In this sentence, 'kullanmayan' describes the house being referenced as not being used.
Bu ev, yıllardır hiç kimse tarafından kullanmayan bir yer.
This house is a place that hasn't been used by anyone for years.
Here, 'kullanmayan' qualifies 'kartları,' indicating the cards that are not being used.