Where does “gem” come from?

gem (Romanian) comes from English JAM, from Urdu جامہ, from Persian جامه, from Middle Persian yʾmk', from Proto-Iranian *yām-, from Proto-Indo-Iranian Yámas, from Proto-Indo-European *yém-o-s.

gem (Romanian): jam; first-person singular present indicative of...

Definitions

jam; first-person singular present indicative of...

Ancestry of “gem”, step by step

Step	Language	Word	Meaning
1	English	JAM	A household that is only barely able to meet its...
2	Urdu	جامہ	garment; robe; gown
3	Persian	جامه	a garment, robe, vest, gown, coat
4	Middle Persian	yʾmk'	—
5	Proto-Iranian	*yām-	—
6	Proto-Indo-Iranian	Yámas	—
7	Proto-Indo-European	*yém-o-s	—

Every word from Proto-Indo-European *yém-o-s →Every word from Proto-Indo-Iranian Yámas →Every word from Proto-Iranian *yām- →