Where does “丸括弧” come from?

丸括弧 (Japanese) comes from Japanese 丸, from Middle Chinese 丸.

丸括弧 (Japanese): a parenthesis; a bracket either of a pair of brackets

Definitions

  1. a parenthesis; a bracket either of a pair of brackets

Ancestry of “丸括弧”, step by step

丸括弧 traces back through two separate lines of ancestry.

via Japanese

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

via Japanese 括弧

StepLanguageWordMeaning
1Japanese括弧a parenthesis; a bracket either of a pair of brackets
Every word from Middle Chinese Every word from Japanese