Where does “交換子” come from?

交換子 (Japanese) comes from Japanese 子, from Japanese 鼠, from Japanese nezumi.

交換子 (Japanese): commutator

Definitions

  1. commutator

Ancestry of “交換子”, step by step

交換子 traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesea child; a girl, especially a dear or desired...
2Japanesea mouse or a rat; general term for members of...
3Japanesenezumi

via Japanese 交換

StepLanguageWordMeaning
1Japanese交換exchange; swap; give-and-take; commutation; to...
Every word from Japanese nezumiEvery word from Japanese Every word from Japanese