Where does “intra-” come from?

intra- (English) comes from Latin intra, from Latin interus, from Proto-Indo-European h₁énteros, from Proto-Indo-European -teros — Contrastive or oppositional adjectival suffix.

intra- (English): a prefix signifying inside, within, interior,...

Definitions

  1. a prefix signifying inside, within, interior,...

Ancestry of “intra-”, step by step

StepLanguageWordMeaning
1Latinintrawithin; inside; during; less than
2Latininterus—
3Proto-Indo-Europeanh₁énterosinside, within
4Proto-Indo-European-terosContrastive or oppositional adjectival suffix

Words derived from “intra-”

Every word from Proto-Indo-European -teros →Every word from Proto-Indo-European h₁énteros →Every word from Latin interus →