Where does “nelinkertaistaminen” come from?

nelinkertaistaminen (Finnish) comes from Finnish nelinkertaistaa, from Finnish nelinkertainen, from Finnish -kertainen, from Finnish kerta, from Proto-Finnic kerta, from Proto-Indo-European kert-, from Proto-Turkic *keŕ- — to travel, tour.

Ancestry of “nelinkertaistaminen”, step by step

StepLanguageWordMeaning
1Finnishnelinkertaistaato quadruple
2Finnishnelinkertainenquadruple; four-time
3Finnish-kertainen-tuple, -fold, "X times as big/many as", or...
4Finnishkertatime, occasion; time; times; also once, when the...
5Proto-Finnickertatime
6Proto-Indo-Europeankert-times; to weave, twist together; time
7Proto-Turkic*keŕ-to travel, tour
Every word from Proto-Turkic *keŕ-Every word from Proto-Indo-European kert-Every word from Proto-Finnic kerta