Where does “iki” come from?

iki (Turkish) comes from Old Turkic äki, from Proto-Turkic ẹk(k)i — two.

iki (Turkish): two

Definitions

Step	Language	Word	Meaning
1	Old Turkic	äki	—
2	Proto-Turkic	ẹk(k)i	two

iki — Etymology, Origin & Word History | Etymology Explorer