Where does “pöytävesi” come from?

pöytävesi (Finnish) comes from Finnish pöytä, from Latin mēnsa, from Latin mēnsus, from Latin -tus, from Proto-Italic -tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

pöytävesi (Finnish): table water drinking water served at the dining table

Definitions

table water drinking water served at the dining table

Ancestry of “pöytävesi”, step by step

pöytävesi traces back through two separate lines of ancestry.

via Finnish pöytä

Step	Language	Word	Meaning
1	Finnish	pöytä	table
2	Latin	mēnsa	a table
3	Latin	mēnsus	having measured, estimated
4	Latin	-tus	Forms the past participle of verbs; Forms...
5	Proto-Italic	-tus	—
6	Proto-Indo-European	-tus	Derives action nouns from verb roots

via Finnish vesi

Step	Language	Word	Meaning
1	Finnish	vesi	water; lake; rheum
2	Proto-Finnic	veci	water
3	Arabic	وعاء	vessel, container, bowl

Every word from Proto-Indo-European -tus →Every word from Latin -tus →Every word from Latin mēnsus →