Where does “лукъ” come from?

лукъ (Old East Slavic) comes from Proto-Slavic lǫkъ, from Proto-Balto-Slavic *lankás, from Proto-Indo-European lenk- — to bend.

Ancestry of “лукъ”, step by step

StepLanguageWordMeaning
1Proto-Slaviclǫkъbow
2Proto-Balto-Slavic*lankásbow
3Proto-Indo-Europeanlenk-to bend

Words derived from “лукъ”

Every word from Proto-Indo-European lenk- →Every word from Proto-Balto-Slavic *lankás →Every word from Proto-Slavic lǫkъ →