Where does “полулунный” come from?

полулунный (Russian) comes from Russian лу́нный, from Russian луна́, from Old East Slavic луна, from Proto-Slavic lunà, from Proto-Balto-Slavic *láukšnāˀ, from Proto-Indo-European lówksneh₂, from Proto-Indo-European lewḱ-, from Proto-Indo-European lewk- — bright; to shine; to see.

полулунный (Russian): half-moon, semilunar, crescent, lunate

Definitions

  1. half-moon, semilunar, crescent, lunate

Ancestry of “полулунный”, step by step

StepLanguageWordMeaning
1Russianлу́нныйmoon; lunar
2Russianлуна́moon
3Old East Slavicлунаmoon
4Proto-Slaviclunàradiance, moonlight
5Proto-Balto-Slavic*láukšnāˀmoon
6Proto-Indo-Europeanlówksneh₂moon
7Proto-Indo-Europeanlewḱ-lynx
8Proto-Indo-Europeanlewk-bright; to shine; to see
Every word from Proto-Indo-European lewk- →Every word from Proto-Indo-European lewḱ- →Every word from Proto-Indo-European lówksneh₂ →