Where does “первоклассник” come from?

первоклассник (Russian) comes from Russian класс, from Latin classis, from Proto-Italic klāssis, from Proto-Indo-European kelh₁- — to call, cry, summon.

первоклассник (Russian): first-former, first-grader a pupil of the first year at school

Definitions

  1. first-former, first-grader a pupil of the first year at school

Ancestry of “первоклассник”, step by step

первоклассник traces back through two separate lines of ancestry.

via Russian класс

StepLanguageWordMeaning
1Russianклассclass
2Latinclassisany one of the five divisions into which Servius...
3Proto-Italicklāssis
4Proto-Indo-Europeankelh₁-to call, cry, summon

via Russian пе́рвый

StepLanguageWordMeaning
1Russianпе́рвыйfirst
Every word from Proto-Indo-European kelh₁-Every word from Proto-Italic klāssisEvery word from Latin classis