Where does “真ん丸” come from?

真ん丸 (Japanese) comes from Japanese 丸, from Middle Chinese 丸.

真ん丸 (Japanese): perfect circle

Definitions

  1. perfect circle

Ancestry of “真ん丸”, step by step

真ん丸 traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanese"any round object"; money; enclosure inside a...
2Middle Chinese

via Japanese 真ん

StepLanguageWordMeaning
1Japanese真んprefixes nouns, adjectives or adjectival nouns beginning with m or n, for intensification; really; truly; totally; completely
Every word from Middle Chinese Every word from Japanese