Where does “vesilinja” come from?

vesilinja (Finnish) comes from Finnish linja, from Old Swedish linia, from Latin līnea, from Latin līnum, from Proto-Italic līnom, from Proto-Indo-European līnom — flax.

vesilinja (Finnish): A waterline

Definitions

A waterline

Ancestry of “vesilinja”, step by step

vesilinja traces back through two separate lines of ancestry.

via Finnish linja

Step	Language	Word	Meaning
1	Finnish	linja	line; policy, line; curriculum, study program
2	Old Swedish	linia	—
3	Latin	līnea	A linen thread
4	Latin	līnum	flax
5	Proto-Italic	līnom	—
6	Proto-Indo-European	līnom	flax

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 līnom →Every word from Proto-Italic līnom →Every word from Latin līnum →