Where does “урдибиҳишт” come from?

урдибиҳишт (Tajik) comes from Classical Persian اُرْدِیبِهِشْت, from Middle Persian 𐭠𐭥𐭲𐭥𐭧𐭱𐭲𐭩, from Middle Persian 𐭥𐭧𐭱𐭲𐭩, from Avestan ????????????, from Avestan ????? — life.

Ancestry of “урдибиҳишт”, step by step

StepLanguageWordMeaning
1Classical Persianاُرْدِیبِهِشْت
2Middle Persian𐭠𐭥𐭲𐭥𐭧𐭱𐭲𐭩Ardwahišt, the second Amahraspand (divine deity) in Zoroastrianism and the guardian of fire
3Middle Persian𐭥𐭧𐭱𐭲𐭩paradise
4Avestan ???????????? paradise, lit. the best existence
5Avestan?????life
Every word from Avestan ?????Every word from Avestan ???????????? Every word from Middle Persian 𐭥𐭧𐭱𐭲𐭩