Where does “звуконепроницаемый” come from?

звуконепроницаемый (Russian) comes from Russian звук, from Proto-Slavic zvǫkъ, from Proto-Slavic -kъ, from Proto-Indo-European -kos — Creates deadjectival and desubstantival...

звуконепроницаемый (Russian): soundproof

Definitions

  1. soundproof

Ancestry of “звуконепроницаемый”, step by step

звуконепроницаемый traces back through two separate lines of ancestry.

via Russian звук

StepLanguageWordMeaning
1Russianзвукsound
2Proto-Slaviczvǫkъsound
3Proto-Slavic-kъDeverbal, forms token nouns; From expressive or...
4Proto-Indo-European-kosCreates deadjectival and desubstantival...

via Russian непроница́емый

StepLanguageWordMeaning
1Russianнепроница́емыйimpenetrable, impervious, impermeable, proof, tight
Every word from Proto-Indo-European -kosEvery word from Proto-Slavic -kъEvery word from Proto-Slavic zvǫkъ