Etymologically

fiber

Etymology and origin of the Latin word fiber

Confidence
Established
Formation
Inherited
First attested
Plautus
Inherited from
Proto-Italic *fifro-
Ultimate origin
Proto-Indo-European (*bʰebʰrú-)

Pronunciation

  • IPA (Classical): [ˈfɪ.bɛr][1]
  • IPA (Ecclesiastical): [ˈfiː.ber][1]

Forms

fiber m (genitive fibrī); second declension[1]

Etymology

It is inherited from Proto-Italic *fifro-, inherited from Proto-Indo-European *bʰe-bʰr-o- (“brown animal, beaver”), a reduplicated form of the root *bʰer- “brown”.[2][1] Cognate with Sanskrit बभ्रु (babhrú-, “reddish-brown”), Lithuanian bebras (“beaver”), Russian бобр (bobr, “beaver”), Old High German bibar (“beaver”) and Old English beofor (“beaver”).[2][3] All the cognates point to *bʰebʰr-, so either the first vowel was raised to /i/ in Latin or the word continues a variant *bʰibʰr-; a few glosses and Varro have feber.[2]

Earliest recorded meaning

De Vaan dates it from Plautus, from a fragment quoted by Festus.[2][4] Köbler dates Plautus c. 250–184 BC.[5]

Semantic evolution

It was the beaver, also called castor, as Pliny describes the beaver of the Black Sea and its prized glands.[3][4] Varro has the variant feber.[2]

Medieval glosses equate it with castor and Old English befer, and in British sources it could also be the otter or the badger.[6] The Germanic name gave English beaver, and Late Latin beber was borrowed from Germanic.[7][4]

Timeline

  • c. 250–184 BC – Plautus uses it.[2][5]
  • 116–27 BC – Varro has the form feber.[2][5]
  • 23/24–79 AD – Pliny the Elder describes the beaver.[4][5]

Meanings

Noun

  1. A beaver.[3]
  2. (Medieval Latin) An otter; a badger.[6]

Word family

  • fibrīnus

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  3. ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
  7. ^ Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Related etymologies

  • opus · also from Proto-Indo-European
  • albus · also from Proto-Indo-European
  • potis · also from Proto-Indo-European
  • salvus · also from Proto-Indo-European
  • socius · also from Proto-Indo-European
  • signum · also from Proto-Indo-European
  • frater · also from Proto-Indo-European
  • foedus · also from Proto-Indo-European
Cite this entry

“Fiber.” Etymologically, 16 Oct. 2026, etymologically.com/la/fiber. Accessed 16 Oct. 2026.

Last edited on . ·