Where does “先カンブリア時代” come from?

先カンブリア時代 (Japanese) comes from Japanese カンブリア, from Latin Cambria, from Proto-Brythonic kömrüɣ, from Proto-Brythonic kömroɣ, from Proto-Brythonic brogos, from Proto-Celtic mrogis, from Proto-Indo-European morǵ- — edge, boundary, border; frontier, border.

先カンブリア時代 (Japanese): the Precambrian eon

Definitions

  1. the Precambrian eon

Ancestry of “先カンブリア時代”, step by step

先カンブリア時代 traces back through 3 separate lines of ancestry.

via Japanese カンブリア

StepLanguageWordMeaning
1JapaneseカンブリアCambria
2LatinCambriaWales
3Proto-Brythonickömrüɣ
4Proto-Brythonickömroɣcompatriot, comrade
5Proto-Brythonicbrogoscountry
6Proto-Celticmrogisborder, borderland, march, mark; region, country,...
7Proto-Indo-Europeanmorǵ-edge, boundary, border; frontier, border

via Japanese

StepLanguageWordMeaning
1Japanesebefore, previous; end, tip; earlier, the past
2Middle Chinesefirst, former; earlier, first

via Japanese 時代

StepLanguageWordMeaning
1Japanese時代age, era, period; the times, spirit of the age;...
Every word from Proto-Indo-European morǵ-Every word from Proto-Celtic mrogisEvery word from Proto-Brythonic brogos