Where does “обрусеть” come from?

обрусеть (Russian) comes from Russian русь, from Old East Slavic Русь, from Finnish ruotsi, from Proto-Finnic *roocci, from Old Swedish roþs-, from Old Norse róðr, from Proto-Germanic rōþrą, from Proto-Indo-European h₁reh₁- — to row; to separate; loose, sparse, rare.

обрусеть (Russian): to Russify, to assimilate and become like a Russian

Definitions

  1. to Russify, to assimilate and become like a Russian

Ancestry of “обрусеть”, step by step

обрусеть traces back through two separate lines of ancestry.

via Russian русь

StepLanguageWordMeaning
1RussianрусьRus
2Old East SlavicРусьRus; Ruthenia
3FinnishruotsiSwedish
4Proto-Finnic*roocciSwede originally anyone from Roslagen
5Old Swedishroþs-related to rowing
6Old Norseróðrrowing
7Proto-Germanicrōþrąoar; rudder
8Proto-Indo-Europeanh₁reh₁-to row; to separate; loose, sparse, rare

via Russian об–

StepLanguageWordMeaning
1Russianоб–before certain letters
Every word from Proto-Indo-European h₁reh₁-Every word from Old Swedish roþs-Every word from Proto-Finnic *roocci