This is the 17211th most frequent Turkish word.
ödeyeceğini
"That (he/she/it) will pay" or "what (he/she/it) will pay."
Here, 'ödeyeceğini' specifies a subordinate clause about a future action ('he would pay').
Ali, sonunda borcunu ödeyeceğini söyledi.
Ali said that he would eventually pay off his debt.
In this case, 'ödeyeceğini' is used to introduce a question about a future action ('how you will pay').
Bu faturayı nasıl ödeyeceğini düşünüyorsun?
How do you think you will pay this bill?
Here, 'ödeyeceğini' expresses an expectation or hope regarding a future event ('you will pay me').