Where does “تەخت” come from?

تەخت (Uyghur) comes from Chagatai تخت, from Persian تخت, from Middle Persian tʾht', from Proto-Iranian *táxtah, from Proto-Indo-Iranian *táktas, from Proto-Indo-European (s)teg- — to cover; pole, stick, beam.

تەخت (Uyghur): throne

Definitions

throne

Ancestry of “تەخت”, step by step

Step	Language	Word	Meaning
1	Chagatai	تخت	throne
2	Persian	تخت	flat; throne; capital
3	Middle Persian	tʾht'	throne
4	Proto-Iranian	*táxtah	—
5	Proto-Indo-Iranian	*táktas	—
6	Proto-Indo-European	(s)teg-	to cover; pole, stick, beam

Every word from Proto-Indo-European (s)teg- →Every word from Proto-Indo-Iranian *táktas →Every word from Proto-Iranian *táxtah →