Where does “脳死” come from?

脳死 (Japanese) comes from Japanese 死, from Middle Chinese 死.

脳死 (Japanese): brain death

Definitions

  1. brain death

Ancestry of “脳死”, step by step

脳死 traces back through two separate lines of ancestry.

via Japanese 死

StepLanguageWordMeaning
1Japanese死death
2Middle Chinese死—

via Japanese 脳

StepLanguageWordMeaning
1Japanese脳the brain; one's brains, one's mental...
2Old Japaneseなすき—
Every word from Middle Chinese 死 →Every word from Japanese 死 →
脳死 — Etymology, Origin & Word History | Etymology Explorer