Where does “hezan” come from?

hezan (Turkish) comes from Armenian հեծան, from Old Armenian հեծան, from Old Armenian հեծանիմ, from Proto-Indo-European sed-s-, from Proto-Indo-European sed- — to sit.

Ancestry of “hezan”, step by step

Step	Language	Word	Meaning
1	Armenian	հեծան	beam, log
2	Old Armenian	հեծան	beam; log; staff, mace
3	Old Armenian	հեծանիմ	to mount, to ride a horse, a pack-animal; to come on board
4	Proto-Indo-European	sed-s-	—
5	Proto-Indo-European	sed-	to sit

Every word from Proto-Indo-European sed- →Every word from Proto-Indo-European sed-s- →Every word from Old Armenian հեծանիմ →