Where does “roikkavalaisin” come from?

roikkavalaisin (Finnish) comes from Finnish roikka, from Russian тро́йка, from Russian три, from Macedonian трие, from Proto-Slavic trьje, from Proto-Balto-Slavic tríjes, from Proto-Indo-European *tréyes.

roikkavalaisin (Finnish): worksite light with a long extension cord

Definitions

worksite light with a long extension cord

Ancestry of “roikkavalaisin”, step by step

roikkavalaisin traces back through two separate lines of ancestry.

via Finnish roikka

Step	Language	Word	Meaning
1	Finnish	roikka	troika; gang, crowd, group, caboodle; extension...
2	Russian	тро́йка	a group of three
3	Russian	три	three; second-person singular imperative...
4	Macedonian	трие	to rub
5	Proto-Slavic	trьje	three
6	Proto-Balto-Slavic	tríjes	three
7	Proto-Indo-European	*tréyes	—

via Finnish valaisin

Step	Language	Word	Meaning
1	Finnish	valaisin	light fixture, luminaire, light fitting, lighting...
2	Finnish	valaista	to light, illuminate; to shed light on,...
3	Finnish	valo	light
4	Proto-Finnic	valo	light visible radiation
5	Proto-Finno-Ugric	waĺɜ	—

Every word from Proto-Indo-European *tréyes →Every word from Proto-Balto-Slavic tríjes →Every word from Proto-Slavic trьje →