This is the 4917th most frequent Turkish word.
faturası
"Faturası" means "its/her/his/the bill or invoice" in English.
The word 'faturası' here functions as a possessive construction, denoting 'invoice of electricity'.
Elektrik faturasını her ay düzenli ödüyorum.
I pay the electricity bill regularly every month.
In this context, 'faturası' refers to the specific bill of the water usage.
Bu ayın su faturasını kaybettim.
I lost this month's water bill.
Here, 'faturası' signifies the itemized billing document of the phone usage.