Where does “чёрный усач” come from?

чёрный усач (Russian) comes from Russian усач, from Russian ус, from Old East Slavic усъ, from Proto-Slavic ǫsъ, from Proto-Slavic vǫdsъ, from Proto-Balto-Slavic wónsa, from Proto-Indo-European wondʰsom, from Proto-Indo-European wendʰ- — to wind, to turn.

чёрный усач (Russian): Any longhorn beetle of the genus Monochamus

Definitions

  1. Any longhorn beetle of the genus Monochamus

Ancestry of “чёрный усач”, step by step

чёрный усач traces back through two separate lines of ancestry.

via Russian усач

StepLanguageWordMeaning
1RussianусачA man with a mustache, especially a large one
2Russianусmoustache; whisker; feeler, antenna
3Old East Slavicусъmoustache, beard
4Proto-Slavicǫsъhair of a moustache; moustache
5Proto-Slavicvǫdsъ
6Proto-Balto-Slavicwónsa
7Proto-Indo-Europeanwondʰsom
8Proto-Indo-Europeanwendʰ-to wind, to turn

via Russian чёрный

StepLanguageWordMeaning
1Russianчёрныйblack; rough, coarse; back
2Proto-Slavicčьrnъblack
3Proto-Balto-Slavickiršnasblack
4Proto-Indo-Europeankr̥snósblack; dark, dusky
5Proto-Indo-Europeankers-black, dirty; run; to run
Every word from Proto-Indo-European wendʰ-Every word from Proto-Indo-European wondʰsomEvery word from Proto-Balto-Slavic wónsa