This is the 12690th most frequent Turkish word.
indirme
"Indirme" means "download" or "reduction" in English, depending on context.
In this sentence, "indirilmesi" is a noun formed from the verb "indirmek" (to download or to lower), referring to the act of downloading.
Dosyanın indirilmesi tamamlandı.
The download of the file is complete.
Here, "indirdim" is the past tense of the verb "indirmek", used to describe the action of downloading.
Cep telefonuma bir uygulama indirdim.
I downloaded an application to my mobile phone.
In this example, "indirilmesi" refers to the act of lowering, showcasing another meaning of the word derived from the same root.