Where does “тяжеловесный” come from?

тяжеловесный (Russian) comes from Russian ве́с, from Proto-Slavic vьśь, from Proto-Indo-European weyḱ-, from Proto-Indo-European wey- — to wither; fade; to move, go ahead; to be strong;...

тяжеловесный (Russian): heavy, weighty

Definitions

  1. heavy, weighty

Ancestry of “тяжеловесный”, step by step

тяжеловесный traces back through two separate lines of ancestry.

via Russian ве́с

StepLanguageWordMeaning
1Russianве́сweight
2Proto-Slavicvьśьall
3Proto-Indo-Europeanweyḱ-to enter in; to settle; settlement
4Proto-Indo-Europeanwey-to wither; fade; to move, go ahead; to be strong;...

via Russian тяжёлый

StepLanguageWordMeaning
1Russianтяжёлыйheavy; difficult, hard; laborious
2Proto-Slavictęželъheavy, weighty
Every word from Proto-Indo-European wey- →Every word from Proto-Indo-European weyḱ- →Every word from Proto-Slavic vьśь →