Siktir is a word in Turkish that could mean “to fuck off” or used as an exclamation like “fuck!” in English. This word comes from the Proto-Turkic root sik- “to fuck” which is most probably a common root with sik - “dick”.
-tir/-tır/-dir/-dır in Turkish (amongst many other Turkic languages, see Uzbek “siktir-”, Azerbaijani “sikdir-”) so the meaning with this suffix comes to be “to make fuck” or “to cause to be fucked”.
As per wikitionary, the Turkish word has 8 descendants in German, Serbo-croatian, Macedonian, Romanian, Bulgarian, Greek, Cypriot Greek and Armenian. While most of these I’ve confirmed like Romanian under some random 6 year old Reddit thread, some like German, I was unable to confirm.
A descendant chart is present in Wikitionary which serves as the main insipiration for this writing.