gönderdiini
Gönderdiini is a term that appears to be a misspelling or a localized colloquialism. The standard Turkish verb for "sent" is "gönderdi." "Gönderdiini" might be an attempt to convey a possessive form of the verb, implying something like "what you sent" or "the thing you sent." However, this construction is not grammatically standard in Turkish.
In Turkish grammar, to express "what you sent," one would typically use phrases like "gönderdiğin şey" (the
It is possible that "gönderdiini" originates from a specific dialect, slang, or perhaps a misunderstanding of