Etymograph

English

luthern

Luthern comes from French lucarne ‘a dormer, dormer window, garret window’, from Old French lucanne ‘opening in the roof of a house, skylight, loft’, and ultimately from Proto-Indo-European *lewg- ‘to bend, turn’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*lewg-1‘to bend, turn’reconstructed
  2. Proto-Germanicc. 500 BCE–200 CE*lūkaną1‘to lock, turn’reconstructed
  3. Proto-West Germanicc. 200–500 CE*lūkan1‘to close, to shut’reconstructed
  4. Proto-West Germanicc. 200–500 CE*lūkā1‘hatch, window’reconstructed
  5. Frankishc. 250–700*lūkinnjā1‘opening closed by a valve, flap’reconstructed
  6. Old Frenchc. 842–1400lucanne1‘opening in the roof of a house, skylight, loft’
  7. Middle Frenchc. 1400–1600lucarne1
  8. Frenchc. 1600–presentlucarne2‘a dormer, dormer window, garret window’
  9. Englishtodayluthern2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, French lucarne
  2. 2 Wiktionary, English luthern

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*lewg-Wiktionary, French lucarne‘to bend, turn’reconstructed
  2. Proto-Germanicc. 500 BCE–200 CE*lūkanąWiktionary, French lucarne‘to lock, turn’reconstructed
  3. Proto-West Germanicc. 200–500 CE*lūkanWiktionary, French lucarne‘to close, to shut’reconstructed
  4. Proto-West Germanicc. 200–500 CE*lūkāWiktionary, French lucarne‘hatch, window’reconstructed
  5. Frankishc. 250–700*lūkinnjāWiktionary, French lucarne‘opening closed by a valve, flap’reconstructed
  6. Old Frenchc. 842–1400lucanneWiktionary, French lucarne‘opening in the roof of a house, skylight, loft’
  7. Middle Frenchc. 1400–1600lucarneWiktionary, French lucarne
  8. Frenchc. 1600–presentlucarneWiktionary, English luthern‘a dormer, dormer window, garret window’
  9. EnglishtodayluthernWiktionary, English luthern

Linked words

through Proto-Indo-European *lewg- ‘to bend, turn’

lock, reluctant, reluctance, leek, loke, 15 more

Today it means

noun A dormer-window.

Sources

Sources: Wiktionary, “luthern”; the older steps come from the Wiktionary entry for French lucarne. 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 *lewg- / luthern

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