Where does “втрое” come from?

втрое (Russian) comes from Russian в, from Old East Slavic въ, from Proto-Slavic vъ(n), from Proto-Indo-European h₁n̥, from Proto-Indo-European h₁én — in.

втрое (Russian): three times as much

Definitions

  1. three times as much

Ancestry of “втрое”, step by step

втрое traces back through two separate lines of ancestry.

via Russian в

StepLanguageWordMeaning
1Russianвin, at, on; to, into; at, in, on
2Old East Slavicвъinside
3Proto-Slavicvъ(n)in, inside, within; in, into, inside; at
4Proto-Indo-Europeanh₁n̥—
5Proto-Indo-Europeanh₁énin

via Russian тро́е

StepLanguageWordMeaning
1Russianтро́еthree
2Proto-Slavic*trojьthree
Every word from Proto-Indo-European h₁én →Every word from Proto-Indo-European h₁n̥ →Every word from Proto-Slavic vъ(n) →