Where does “šah” come from?

šah (Serbo-Croatian) comes from Classical Persian شاه, from Middle Persian 𐭬𐭫𐭪𐭠, from Old Persian 𐏋, from Proto-Iranian xšáyati, from Proto-Indo-Iranian kšáyati, from Proto-Indo-European teḱ- — to sire, beget.

šah (Serbo-Croatian): shah; chess; check

Definitions

shah; chess; check

Ancestry of “šah”, step by step

Step	Language	Word	Meaning
1	Classical Persian	شاه	—
2	Middle Persian	𐭬𐭫𐭪𐭠	king
3	Old Persian	𐏋	king
4	Proto-Iranian	xšáyati	—
5	Proto-Indo-Iranian	kšáyati	he rules, he has power over
6	Proto-Indo-European	teḱ-	to sire, beget

Every word from Proto-Indo-European teḱ- →Every word from Proto-Indo-Iranian kšáyati →Every word from Proto-Iranian xšáyati →