Where does “Oblong” come from?

Oblong (Polish) comes from Polish Obłąk, from Proto-Slavic oblǫkъ, from Proto-Slavic lǫkъ, from Proto-Balto-Slavic *lankás, from Proto-Indo-European lenk- — to bend.

Ancestry of “Oblong”, step by step

StepLanguageWordMeaning
1PolishObłąk—
2Proto-Slavicoblǫkъ—
3Proto-Slaviclǫkъbow
4Proto-Balto-Slavic*lankásbow
5Proto-Indo-Europeanlenk-to bend
Every word from Proto-Indo-European lenk- →Every word from Proto-Balto-Slavic *lankás →Every word from Proto-Slavic lǫkъ →