Where does “拒絶反応” come from?

拒絶反応 (Japanese) comes from Japanese 反応, from English reäction, from Middle English reaccion, from Old French reaction, from Latin reactio, from Latin reago, from Latin rĕ-, from Latin prōdūcō — passed , crossed.

拒絶反応 (Japanese): transplant rejection; allergic reaction

Definitions

transplant rejection; allergic reaction

Ancestry of “拒絶反応”, step by step

拒絶反応 traces back through two separate lines of ancestry.

via Japanese 反応

Step	Language	Word	Meaning
1	Japanese	反応	chemical reaction; reaction, response; feedback
2	English	reäction	Rare spelling of reaction
3	Middle English	reaccion	reaction
4	Old French	reaction	—
5	Latin	reactio	reaction
6	Latin	reago	I act upon again, I do again; I react
7	Latin	rĕ-	back, backwards
8	Latin	prōdūcō	to lead or bring forth, forward or out
9	Latin	prō-	forward direction, forward movement
10	Proto-Italic	*pro-	pro- see the Latin entry for further meanings
11	Proto-Indo-European	pro-	toward, forward
12	Proto-Indo-European	por-	to give birth; forward, through; going, passage
13	Proto-Indo-European	per-	before, in front; first; to go through
14	Proto-Indo-European	pr̥tós	passed , crossed

via Japanese 拒絶

Step	Language	Word	Meaning
1	Japanese	拒絶	refusal; refuse

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Latin rĕ- →