Where does “再確認” come from?

再確認 (Japanese) comes from Japanese 再, from Middle Chinese 再.

再確認 (Japanese): reaffirmation, reconfirmation

Definitions

  1. reaffirmation, reconfirmation

Ancestry of “再確認”, step by step

再確認 traces back through two separate lines of ancestry.

via Japanese 再

StepLanguageWordMeaning
1Japanese再re-, again, repeated
2Middle Chinese再—

via Japanese 確認

StepLanguageWordMeaning
1Japanese確認confirmation; confirm, make sure, check, verify
Every word from Middle Chinese 再 →Every word from Japanese 再 →