Where does “mechanismus” come from?

mechanismus (New Latin) comes from Ancient Greek μηχανή, from Ancient Greek μῆχος, from Proto-Indo-European meǵʰ-.

Ancestry of “mechanismus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	μηχανή	contrivance, machine, device, gear; way, means
2	Ancient Greek	μῆχος	means, expedient, remedy
3	Proto-Indo-European	meǵʰ-	—

mechanismus — Etymology, Origin & Word History | Etymology Explorer