- Confidence
- Established
- Formation
- Inherited
- First attested
- Plautus
- Inherited from
- Proto-Italic *fifro-
- Ultimate origin
- Proto-Indo-European (*bʰebʰrú-)
Pronunciation
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
Word family
- fibrīnus
Related words
- castor
- English beaver
References
- ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ 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
- ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ 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
- ^ 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 . ·