Where does “Arabiston” come from?

Arabiston (Uzbek) comes from Uzbek -iston, from Chagatai ـستان, 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-.

Ancestry of “Arabiston”, step by step

StepLanguageWordMeaning
1Uzbek-istonistan
2Chagataiـستان—
3Classical Persianـِسْتَان—
4Middle Persian-stʾn'makes nouns of places; of indeterminate function
5Old Persian𐎿𐎫𐎠𐎴place
6Proto-Iranianstā́nam—
7Proto-Indo-IranianstʰáHnam—
8Proto-Indo-European*steh₂-—
Every word from Proto-Indo-European *steh₂- →Every word from Middle Persian -stʾn' →Every word from Classical Persian ـِسْتَان →