English word zymogen comes from English -gen (A producer of something, e.g. hydrogen.), English zymo- (Fermentation.)

Detailed word origin of zymogen

Dictionary entry	Language	Definition
-gen	English (eng)	A producer of something, e.g. hydrogen.
zymo-	English (eng)	Fermentation.
zymogen	English (eng)	(biochemistry) A proenzyme, or enzyme precursor, which requires a biochemical change (i.e. hydrolysis) to become an active form of the enzyme.

Words with the same origin as zymogen