Where does “меҳр” come from?

меҳр (Tajik) comes from Classical Persian مِهْر, from Middle Persian mtr', from Old Persian 𐎷𐎰𐎼, from Avestan 𐬨𐬌𐬚𐬭𐬀, from Proto-Iranian miθráh, from Proto-Indo-Iranian mitrás, from Proto-Indo-European mēy- — soft, tender, dear.

Ancestry of “меҳр”, step by step

StepLanguageWordMeaning
1Classical Persianمِهْر—
2Middle Persianmtr'sun; love, friendship
3Old Persian𐎷𐎰𐎼Mithra, a Zoroastrian deity
4Avestan𐬨𐬌𐬚𐬭𐬀contract; agreement; pact
5Proto-Iranianmiθráh—
6Proto-Indo-Iranianmitráscovenant; treaty; agreement
7Proto-Indo-Europeanmēy-soft, tender, dear
Every word from Proto-Indo-European mēy- →Every word from Proto-Indo-Iranian mitrás →Every word from Proto-Iranian miθráh →