Where does “Einführungsjahr” come from?

Einführungsjahr (German) comes from German Einführung, from German einführen, from Latin intrōdūcere, from Latin intrōdūcō, from Latin intrō, from Latin intra, from Latin interus, from Proto-Indo-European h₁énteros — Contrastive or oppositional adjectival suffix.

Einführungsjahr (German): year of introduction; founded

Definitions

year of introduction; founded

Ancestry of “Einführungsjahr”, step by step

Step	Language	Word	Meaning
1	German	Einführung	introduction
2	German	einführen	to introduce, to begin; to insert; to import
3	Latin	intrōdūcere	—
4	Latin	intrōdūcō	—
5	Latin	intrō	—
6	Latin	intra	within; inside; during; less than
7	Latin	interus	—
8	Proto-Indo-European	h₁énteros	inside, within
9	Proto-Indo-European	-teros	Contrastive or oppositional adjectival suffix

Every word from Proto-Indo-European -teros →