Where does “staniu” come from?

staniu (Romanian) comes from Italian stagno, from Latin stagnum, from Proto-Indo-European steh₂g- — to seep drip; to seep, drip.

staniu (Romanian): tin

Definitions

Step	Language	Word	Meaning
1	Italian	stagno	tin, a metallic element; pond, water hole; tarn
2	Latin	stagnum	pond, swamp, fen; any piece of standing water;...
3	Proto-Indo-European	steh₂g-	to seep drip; to seep, drip

staniu — Etymology, Origin & Word History | Etymology Explorer