Where does “vartioalus” come from?

vartioalus (Finnish) comes from Finnish vartio, from Finnish vartija, from Finnish -ja, from Proto-Finnic -ja, from Proto-Uralic -ja — Forms the present participle.

vartioalus (Finnish): guard vessel, patrol vessel

Definitions

guard vessel, patrol vessel

Ancestry of “vartioalus”, step by step

vartioalus traces back through two separate lines of ancestry.

via Finnish vartio

Step	Language	Word	Meaning
1	Finnish	vartio	guard, watch; troop
2	Finnish	vartija	guard
3	Finnish	-ja	-er
4	Proto-Finnic	-ja	Forms agent nouns from verbs
5	Proto-Uralic	-ja	Forms the present participle

via Finnish alus

Step	Language	Word	Meaning
1	Finnish	alus	vessel, craft, ship; underlay, base; subject
2	Finnish	ala	area, field, domain; field, discipline; industry,...
3	Proto-Finnic	ala	lower; under
4	Proto-Uralic	ëla	below

Every word from Proto-Uralic -ja →Every word from Finnish -ja →Every word from Finnish vartija →