Where does “introduction” come from?

introduction (Old French) comes from Latin introductionem, from Latin intrōductiō, from Latin intrōdūcō, from Latin intrō, from Latin intra, from Latin interus, from Proto-Indo-European h₁énteros, from Proto-Indo-European -teros — Contrastive or oppositional adjectival suffix.

Ancestry of “introduction”, step by step

StepLanguageWordMeaning
1Latinintroductionemaccusative singular of intrōductiō
2Latinintrōductiōinnovation
3Latinintrōdūcōto lead in: to conduct into
4Latinintrōto enter, go into, come in, get in, penetrate
5Latinintrawithin; inside; during; less than
6Latininterus
7Proto-Indo-Europeanh₁énterosinside, within
8Proto-Indo-European-terosContrastive or oppositional adjectival suffix

Words derived from “introduction

Every word from Proto-Indo-European -terosEvery word from Proto-Indo-European h₁énterosEvery word from Latin interus