ʾštyh • (āštīh)
Compound of *ʾšt (āšt) + -yh (“-īh”), the first part is from Old Persian *𐎠𐎧𐏁𐎫𐎡 (āxšti-) (compare Avestan 𐬁𐬑𐬱𐬙𐬌𐬱 (āxštiš)).