This is the 13362nd most frequent Turkish word.
kirayı
"The rent" (accusative case of "kira").
In this sentence, 'kirayı' refers to the rent as the direct object of the verb 'ödemedim' (haven't paid).
Bu ayın kirayı henüz ödemedim.
I haven't paid this month's rent yet.
Here, 'kirayı' again represents the rent and is the object of the verb 'ödüyoruz' (pay).
Kirayı her ay düzenli olarak ödüyoruz.
We pay the rent regularly every month.
In this example, 'kirayı' is used as the object of the verb 'düşürmek' (to lower), indicating the action is related to the amount of rent.