Where does “kuprinė” come from?

kuprinė (Lithuanian) comes from Esperanto kupra, from Esperanto kupro, from Latin cūprum, from Latin cȳprium, from Ancient Greek Κύπρος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

kuprinė (Lithuanian): backpack

Definitions

backpack

Ancestry of “kuprinė”, step by step

Step	Language	Word	Meaning
1	Esperanto	kupra	of or relating to copper
2	Esperanto	kupro	copper
3	Latin	cūprum	copper (the metal)
4	Latin	cȳprium	—
5	Ancient Greek	Κύπρος	Cyprus
6	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
7	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →