Where does “letokruh” come from?

letokruh (Czech) comes from Czech kruh, from Old Czech kruh, 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.

letokruh (Czech): tree ring, annual ring, growth ring

Definitions

  1. tree ring, annual ring, growth ring

Ancestry of “letokruh”, step by step

letokruh traces back through two separate lines of ancestry.

via Czech kruh

StepLanguageWordMeaning
1Czechkruhdisc; wheel; circle
2Old Czechkruh—
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

via Czech léto

StepLanguageWordMeaning
1Czechlétosummer
2Proto-Slaviclětosummer; year
3Proto-Indo-Europeanleh₁tóm—
Every word from Proto-Indo-European sek- →Every word from Proto-Indo-European (s)ker- →Every word from Proto-Indo-European krongʰ-o- →