Where does “bölünmək” come from?

bölünmək (Azerbaijani) comes from Azerbaijani il, from Old Anatolian Turkish یل, from Proto-Turkic yïl — year.

Ancestry of “bölünmək”, step by step

bölünmək traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Azerbaijani	il	year
2	Old Anatolian Turkish	یل	wind, the real or perceived movement of atmospheric air usually caused by convection or differences in air pressure
3	Proto-Turkic	yïl	year

Step	Language	Word	Meaning
1	Azerbaijani	bölmək	to divide, split
2	Old Anatolian Turkish	böl-	to separate
3	Proto-Turkic	bȫl-	to divide, separate; to divide, separate,...