Where does “گواهی” come from?

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

گواهی (Persian): testimony

Definitions

testimony

Ancestry of “گواهی”, step by step

گواهی traces back through two separate lines of ancestry.

via Persian ـی

Step	Language	Word	Meaning
1	Persian	ـی	Forms nouns or adjectives from nouns; Forms...
2	Middle Persian	-yk'	—
3	Old Persian	-𐎡𐎣	of, pertaining to, belonging to, related to
4	Proto-Indo-Iranian	-kas	Creates deadjectival and desubstantival...
5	Proto-Indo-European	-ḱos	-y, -ic

via Persian گواه

Step	Language	Word	Meaning
1	Persian	گواه	witness; evidence
2	Middle Persian	gwk'dy	—

Words derived from “گواهی”

गवाही
गवाय

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