Etymograph

English

infrangible

Infrangible comes from Old French infrangible, from Latin frangō ‘to break’, and ultimately from Proto-Indo-European *bʰreg-.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*bʰreg-1‘to break’reconstructed
  2. Latinc. 75 BCE–200 CEfrangō2‘to break’
  3. Old Frenchc. 842–1400infrangible2
  4. Middle Frenchc. 1400–1600infrangible2
  5. Englishtodayinfrangible2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin frango
  2. 2 Wiktionary, English infrangible

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*bʰreg-Wiktionary, Latin frango‘to break’reconstructed
  2. Latinc. 75 BCE–200 CEfrangōWiktionary, English infrangible‘to break’
  3. Old Frenchc. 842–1400infrangibleWiktionary, English infrangible
  4. Middle Frenchc. 1400–1600infrangibleWiktionary, English infrangible
  5. EnglishtodayinfrangibleWiktionary, English infrangible

Linked words

through Proto-Indo-European *bʰreg- ‘to break’

break, broken, broke, brigade, brake, bracket, fraction, bray, suffrage, frail, breech, brogan, brogue, 34 more

through Latin frangō ‘to break’

fracture, fragment, fragile, refrain, fret, diffraction, fractal, refractory, refraction, infraction, infringe, 15 more

Today it means

adj Unbreakable, indestructible, or very difficult to break.

Sources

Sources: Wiktionary, “infrangible”; the older steps come from the Wiktionary entry for Latin frango. 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 *bʰreg- / infrangible

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