Where does “полукруглый” come from?

полукруглый (Russian) comes from Russian полукру́г, from Russian круг, from Proto-Slavic krǫgъ, from Proto-Indo-European krongʰ-o-, from Proto-Indo-European (s)ker-, from Proto-Indo-European sek- — to cut, cut off, sever.

полукруглый (Russian): semicircular

Definitions

  1. semicircular

Ancestry of “полукруглый”, step by step

StepLanguageWordMeaning
1Russianполукру́гsemicircle
2Russianкругcircle, ring; sphere, range; orbit
3Proto-Slavickrǫgъcircle
4Proto-Indo-Europeankrongʰ-o-—
5Proto-Indo-European(s)ker-to cut off; to turn, bend
6Proto-Indo-Europeansek-to cut, cut off, sever
Every word from Proto-Indo-European sek- →Every word from Proto-Indo-European (s)ker- →Every word from Proto-Indo-European krongʰ-o- →