Etymograph

English

casern

Casern comes from French caserne ‘barracks’, from Latin quaternus ‘four each’, and ultimately from Proto-Indo-European *kʷetwóres.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*kʷetwóres1‘four’reconstructed
  2. Latinc. 75 BCE–200 CEquater1‘four times’
  3. Latinc. 75 BCE–200 CEquaternus2as quaterna‘four each’
  4. Old Occitanc. 950–1500cazerna2
  5. Frenchc. 1600–presentcaserne3‘barracks’
  6. Englishtodaycasern3

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin quaternus
  2. 2 Wiktionary, French caserne
  3. 3 Wiktionary, English casern

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*kʷetwóresWiktionary, Latin quaternus‘four’reconstructed
  2. Latinc. 75 BCE–200 CEquaterWiktionary, Latin quaternus‘four times’
  3. Latinc. 75 BCE–200 CEquaternusWiktionary, French caserneas quaterna‘four each’
  4. Old Occitanc. 950–1500cazernaWiktionary, French caserne
  5. Frenchc. 1600–presentcaserneWiktionary, English casern‘barracks’
  6. EnglishtodaycasernWiktionary, English casern

The story

From French caserne, attested since the late 1600s.

Full etymology on Wiktionary

Linked words

through Proto-Indo-European *kʷetwóres ‘four’

fourth, quarry, cater, farthing, quatre, cuatro, tetrad, quatrain, ferd, 17 more

through Latin quaternus ‘four each’

kern, quire, carillon, 4 more

Today it means

noun A lodging for soldiers in a garrison town (formerly usually near the rampart); a barracks.

Sources

Sources: Wiktionary, “casern”; the older steps come from the Wiktionary entries for Latin quaternus, French caserne. 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 *kʷetwóres / casern