English
interior
Interior comes from Latin interior ‘inner’, from earlier *interus, from Proto-Indo-European *h₁énteros ‘inner’, from *h₁én ‘in’.
- Proto-Indo-Europeanc. 4500–2500 BCE*h₁én1‘in’reconstructed
- Proto-Indo-Europeanc. 4500–2500 BCE*h₁énteros2‘inner’reconstructed
- Latinc. 75 BCE–200 CE*interus3‘inner’reconstructed
- Latinc. 75 BCE–200 CEinterior3‘inner’
- Englishearliest quotation 1989interior3
attested reconstructed ? uncertain or disputed deepest recorded ancestor
- 1 Wiktionary, Proto-Indo-European *h₁énteros
- 2 Wiktionary, Latin interior
- 3 Wiktionary, English interior
- Earliest quotation in Wiktionary’s entry: 1989, Priit J. Vesilind, The Baltic: Arena of Power: “Nearly 44 percent of all cargo involves the Soviet…”.
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*h₁énWiktionary, Proto-Indo-European *h₁énteros‘in’reconstructed
- Proto-Indo-Europeanc. 4500–2500 BCE*h₁énterosWiktionary, Latin interior‘inner’reconstructed
- Latinc. 75 BCE–200 CE*interusWiktionary, English interior‘inner’reconstructed
- Latinc. 75 BCE–200 CEinteriorWiktionary, English interior‘inner’
- Englishearliest quotation 1989interiorWiktionary, English interior. Earliest quotation in Wiktionary’s entry: 1989, Priit J. Vesilind, The Baltic: Arena of Power: “Nearly 44 percent of all cargo involves the Soviet…”
Word family
English words that share an ancestor with interior, grouped by the ancestor they share, most familiar first.
through Proto-Indo-European *h₁en ‘in’
- inner ← innera ← inne
- introversion ← intrōversio ← intro ← *h₁énteros
through Proto-Indo-European *h₁énteros ‘inner, what is inside’
15 more relatives in the full family tree
No ads, ever.
Explore everything descended from *h₁én →
No ads, ever. This is how the app stays alive.
Become a founding member, $29 onceWear this word, $32Support the app
Today it means
adj Within any limits, enclosure, or substance; inside; internal; inner.
Sources
Sources: Wiktionary, “interior”; the older steps come from the Wiktionary entries for Proto-Indo-European *h₁énteros, Latin interior. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / Proto-Indo-European *h₁én / interior