Where does “лишайник” come from?

лишайник (Russian) comes from Russian лиша́й, from Proto-Slavic lišajь, from Proto-Slavic lixъ, from Proto-Indo-European leykʷ- — to leave.

лишайник (Russian): lichen (symbiotic organism)

Definitions

  1. lichen (symbiotic organism)

Ancestry of “лишайник”, step by step

StepLanguageWordMeaning
1Russianлиша́йlichen
2Proto-Slaviclišajьlichen
3Proto-Slaviclixъremaining, unnecessary, superfluous, bad
4Proto-Indo-Europeanleykʷ-to leave
Every word from Proto-Indo-European leykʷ- →Every word from Proto-Slavic lixъ →Every word from Proto-Slavic lišajь →