Where does “сентябрьский” come from?

сентябрьский (Russian) comes from Russian сентя́брь, from Latin september, from Latin Septem, from Proto-Italic septem, from Proto-Indo-European septḿ̥ — seven.

сентябрьский (Russian): September

Definitions

  1. September

Ancestry of “сентябрьский”, step by step

StepLanguageWordMeaning
1Russianсентя́брьSeptember
2Latinseptemberof September
3LatinSeptemseven; 7
4Proto-Italicseptemseven
5Proto-Indo-Europeanseptḿ̥seven
Every word from Proto-Indo-European septḿ̥ →Every word from Proto-Italic septem →Every word from Latin Septem →