Where does “первоклассный” come from?

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

первоклассный (Russian): first-class, first-rate, high-class

Definitions

  1. first-class, first-rate, high-class

Ancestry of “первоклассный”, step by step

первоклассный 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 klāssis →Every word from Latin classis →