Where does “-ы” come from?

-ы (Moksha) comes from Persian ـی, from Middle Persian -yk', from Old Persian -𐎡𐎣, from Proto-Indo-Iranian -kas, from Proto-Indo-European -ḱos — -y, -ic.

-ы (Moksha): agentive suffix

Definitions

  1. agentive suffix

Ancestry of “-ы”, step by step

-ы traces back through 3 separate lines of ancestry.

via Persian ـی

StepLanguageWordMeaning
1PersianـیForms nouns or adjectives from nouns; Forms...
2Middle Persian-yk'—
3Old Persian-𐎡𐎣of, pertaining to, belonging to, related to
4Proto-Indo-Iranian-kasCreates deadjectival and desubstantival...
5Proto-Indo-European-ḱos-y, -ic

via Arabic ـِيّ

StepLanguageWordMeaning
1Arabicـِيّ{{n-g|suffix used to derive adjectives and...

via Middle Mongolian ᠤ᠋

StepLanguageWordMeaning
1Middle Mongolianᠤ᠋—

Words derived from “-ы”

Every word from Proto-Indo-European -ḱos →Every word from Middle Persian -yk' →Every word from Persian ـی →