Where does “赤の広場” come from?

赤の広場 (Japanese) comes from Japanese の, from Old Japanese の, from Middle Chinese 能 — talent, ability.

Ancestry of “赤の広場”, step by step

赤の広場 traces back through 3 separate lines of ancestry.

via Japanese の

StepLanguageWordMeaning
1Japaneseのgenitive case marker; nominative case marker in a...
2Old Japaneseのplain, field
3Middle Chinese能talent, ability

via Japanese 赤

StepLanguageWordMeaning
1Japanese赤red; communism, socialism; a communist

via Japanese 広場

StepLanguageWordMeaning
1Japanese広場open area, square
Every word from Middle Chinese 能 →Every word from Old Japanese の →Every word from Japanese の →