Where does “uzay” come from?

uzay (Turkish) comes from Turkish uzamak, from Proto-Turkic uŕa- — to be long, prolonged.

uzay (Turkish): space

Definitions

Step	Language	Word	Meaning
1	Turkish	uzamak	to extend, stretch, lengthen, grow longer; to...
2	Proto-Turkic	uŕa-	to be long, prolonged

uzay — Etymology, Origin & Word History | Etymology Explorer