Where does “двуязычность” come from?

двуязычность (Russian) comes from Russian двуязы́чный, from Russian язы́к, from Old East Slavic ѧзꙑкъ, from Proto-Slavic ęzykъ, from Proto-Balto-Slavic inźūˀ-kas, from Proto-Balto-Slavic *inźūˀs, from Proto-Balto-Slavic *dinźūˀs, from Proto-Indo-European dn̥ǵʰwéh₂s — tongue.

двуязычность (Russian): bilingualism

Definitions

  1. bilingualism

Ancestry of “двуязычность”, step by step

StepLanguageWordMeaning
1Russianдвуязы́чныйbilingual
2Russianязы́кtongue; language
3Old East Slavicѧзꙑкъa tongue
4Proto-Slavicęzykъtongue; language
5Proto-Balto-Slavicinźūˀ-kas
6Proto-Balto-Slavic*inźūˀstongue
7Proto-Balto-Slavic*dinźūˀs
8Proto-Indo-Europeandn̥ǵʰwéh₂stongue
Every word from Proto-Indo-European dn̥ǵʰwéh₂sEvery word from Proto-Balto-Slavic *dinźūˀsEvery word from Proto-Balto-Slavic *inźūˀs