Where does “ـستان” come from?

ـستان (Urdu) comes from Classical Persian ـِسْتَان, from Middle Persian -stʾn', from Old Persian 𐎿𐎫𐎠𐎴, from Proto-Iranian stā́nam, from Proto-Indo-Iranian stʰáHnam, from Proto-Indo-European *steh₂-.

ـستان (Urdu): istan, -stan

Definitions

istan, -stan

Ancestry of “ـستان”, step by step

Step	Language	Word	Meaning
1	Classical Persian	ـِسْتَان	—
2	Middle Persian	-stʾn'	makes nouns of places; of indeterminate function
3	Old Persian	𐎿𐎫𐎠𐎴	place
4	Proto-Iranian	stā́nam	—
5	Proto-Indo-Iranian	stʰáHnam	—
6	Proto-Indo-European	*steh₂-	—

Every word from Proto-Indo-European *steh₂- →Every word from Middle Persian -stʾn' →Every word from Classical Persian ـِسْتَان →